1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tanzania [10]
3 years ago
12

In a group of 92 students 40 have brown eyes, 35 have hazel eyes, and 17 have blue eyes. Find the probability that a student pic

ked from this group at random either has hazel or brown eyes? Enter your answer as a fraction in the form a/b (for example 2/3, 5/7) or as an integer.
Mathematics
1 answer:
Oliga [24]3 years ago
6 0

Answer:

as a fraction = 75/92

as a percentage = 81.52%

Step-by-step explanation:

total no of students = 92

probability that a student has hazel or brown eyes = Pr(hazel or brown)

but probability of a or b happening ie Pr(a or b) simply is Pr (a) +Pr (b)

therefore Pr(hazel or brown) = Pr(hazel)+ Pr(brown)

Pr(brown) = (no of brown eyes )/(total set of eyes)

                = 40/92 = 10/23

Pr( hazel) = (no of hazel eyes )/(total set of eyes)

                  = 35/92 =35/92

hence Pr(hazel or brown) = (10/23) + (35/92) =75/92

so there's 75/92 probability (or 0.8 out of 1 chance )to choose either hazel or brown randomly

You might be interested in
There is a triangle with a perimeter of 63 cm, one side of which is 21 cm. Also, one of the medians is perpendicular to one of t
NemiM [27]

Answer:

21cm; 28cm; 14cm

Step-by-step explanation:

There is no info in the problem/s  text which one of the triangle's  side is 21 cm. That is why we have to try all possible variants.

Let the triangle is ABC . Let the AK is the angle A bisector and BM is median.

Let O is AK and BM cross point.

Have a look to triangle ABM.  AO is the bisector and AOB=AOM=90 degrees (means that AO is as bisector as altitude)

=> triangle ABM is isosceles => AB=AM  (1)

1. Let AC=21   So AM=21/2=10.5 cm

So AB=10.5 cm as well.  So BC= P-AB-AC=63-21-10.5=31.5 cm

Such triangle doesn' t exist ( is impossible), because the triangle's inequality doesn't fulfill.  AB+AC>BC ( We have 21+10.5=31.5 => AB+AC=BC)

2. Let AB=21 So AM=21 and AC=42 .So  BC= P-AB-AC=63-21-42=0 cm- such triangle doesn't exist.

3. Finally let BC=21 cm. So AB+AC= 63-21=42 cm

We know (1) that AB=AM so AC=2*AB.  So AB+AC=AB+2*AB=3*AB

=>3*AB=42=> AB=14 cm => AC=2*14=28 cm.

Let check if this triangle exists ( if the triangle's inequality fulfills).

BC+AB>AC    21+14>28 - correct=> the triangle with the sides' length 21cm,14 cm, 28cm exists.

This variant is the only possible solution of the given problem.

6 0
3 years ago
What is the result when we simplify the expression ( 1 + 1/ x ) ( 1 − 2/ x + 1 ) ( 1 + 2/ x − 1 )
BaLLatris [955]

Answer:

\frac{4(x + 1)(x - 1)}{ {x}^{3} }

Step-by-step explanation:

I have a app called photomath, I really hope this works.

5 0
2 years ago
Find the missing length in the image below
Ket [755]

Answer:

1 length ityoughkdds hshlkb

7 0
3 years ago
Read 2 more answers
Graph: y +2=
olga_2 [115]

Answer:

  see below

Step-by-step explanation:

The point-slope form of the equation of a line is ...

  y -h = m(x -k)

for a line with slope m through point (h, k).

Comparing this to the given equation, you see that ...

  h = -2, m = 1, k = -4

The line has a slope of 1 and goes through the point (-4, -2). This information is useful for graphing.

__

You can also rearrange the equation to slope-intercept form by subtracting 2 from both sides.

  y = x +2

This has a slope of 1 and crosses the y-axis at y=2. It graphs the same as the above.

6 0
3 years ago
Which of the following functions best describes this graph?
ValentinkaMS [17]

Answer: y=x^2+7x+10

Step-by-step explanation: apex

3 0
3 years ago
Other questions:
  • What angle do the minute and hour hands make at 4:30??
    13·1 answer
  • Heyyyy any one wanna help me?!?!?!
    13·1 answer
  • Kyle wants to make $10,000 in gift cards. Each gift card is worth $100 and costs 1,200,000 in points. How many points does Kyle
    13·1 answer
  • Ixl/Signin/Eli whitney Help please
    10·1 answer
  • a sporting goods store offers a 40% discount on all gulf clubs. rocco spent 20% of the money in his savings account on a golf pu
    7·1 answer
  • When the polynomial is written in standard form, what are the values of the leading coefficient and the constant?
    7·1 answer
  • Betsy is ordering prizes for a school fair. She must order 2 helium balloons for every 5 people and 3 stuffed animals for every
    13·1 answer
  • There are two possible offers that could be applied to orange juice that would each explain this reduction in the total bill. 4:
    7·1 answer
  • The perimeter of a rhombus is 84 inches. one
    14·1 answer
  • By definition, theoretical probability is equal to:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!