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
cricket20 [7]
3 years ago
6

Jack rolls a number cube twice. What is the probability that the sum of the 2 rolls is less than 8 given that the first roll is

a 4?
one over two

one over six

one over three

five over six
Mathematics
2 answers:
disa [49]3 years ago
8 0
If the first roll is a 4, the possibilities to add less than 8 are that the second cube roll is 1, 2 or 3.

These are 3 different events out of 6 possilbe ones, which is 3 / 6 = 1 / 2; i.e. half of times.

Then the answer is the first option: 1 / 2
nevsk [136]3 years ago
3 0

Answer:  The correct option is (a) one over two.

Step-by-step explanation:  Given that Jack rolls a number cube twice. We are to find the probability that the sum of the 2 rolls is less than 8 given that he first roll is a 4.

A cube rolls 1, 2, 3, 4, 5 and 6. So, the sample space will be

S = {1, 2, 3, 4, 5, 6}.

That is, n(S) = 6.

Since the first roll is a 4, so the options for the second roll are 1, 2 and 3 so that the sum is less than 8.

Therefore, if 'A' is the event that the sum is less than 4, then

A = {1, 2, 3}.

That is, n(A) = 3.

So, the probability of happening of event A is given by

P(A)=\dfrac{n(A)}{n(S)}=\dfrac{3}{6}=\dfrac{1}{2}.

Thus, the required probability is one over half.

Option (a) is correct.

You might be interested in
Subtract. 6 – (–5)a. –11b. –1c. 1d. 11
irina [24]
6-(-5)
6+5 = 11

The answer is D!
7 0
3 years ago
Out of 360 students, 315 went on the class field trip. What percent of students did not go on the class field trip.
astraxan [27]

315 did

therefore

360-315=45 didnt

45/360 students didnt go on the trip

so to turn this into a percentage, just multiply this fraction by 100:

45/360*100 = 12.5%

6 0
3 years ago
Read 2 more answers
What are the measures of ∠a, ∠b, ∠c and ∠d? Explain how to find each of the angles. measure
Alex787 [66]

Answer:

a=90° (given)

b=180°-90°-59° (angles on a straight line)

c=180°-59° (angles on a straight line)

d=59° (vertically opposite angles)

Step-by-step explanation:

I said the answer already

7 0
3 years ago
Vita saved $72 last December. This amount represents 2/9 of the total amount she saved last year. What is the total amount Vita
GrogVix [38]
\dfrac{2}{9} \text { of the saving} = \$72

-----------------------------------------------
Find 1/9 :
-----------------------------------------------
\dfrac{1}{9} \text { of the saving} = \$72 \div 2

\dfrac{1}{9} \text { of the saving} = \$36

-----------------------------------------------
Find 9/9 :
-----------------------------------------------
\dfrac{9}{9} \text { of the saving} = \$36 \times 9

\dfrac{9}{9} \text { of the saving} = \$324

-----------------------------------------------
Answer: The total amount is $324.
-----------------------------------------------
7 0
3 years ago
Evaluate and answer in standard form:<br><br>4^2/3^2​
Semenov [28]

the answer is : 1.7777

6 0
3 years ago
Other questions:
  • Select the correct text in the passage.
    5·1 answer
  • HELPPPPPPPPPPPPPPPPPPPPPPPPPP PLZZZZZZZZZZZZZZZZZZzz
    7·2 answers
  • Original price:$60; Markup:15%; Related price:
    8·1 answer
  • 55gvbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
    13·1 answer
  • An appliance store delivers large appliances using vans and trucks. When loaded, each can holds 6 appliances and each truck hold
    9·1 answer
  • Is a bushel bigger than a gallon?
    5·2 answers
  • Amplitude of h(x)=-4sin(2x-7)+3
    11·1 answer
  • Now consider the family of lines ax + by = c such that a, b and c are consecutive multiples of each other. what would that mean?
    5·1 answer
  • Help me please!!!!!!!1111
    10·1 answer
  • What's the prime number grater than 20​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!