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
anzhelika [568]
3 years ago
9

PLZ HELP ME! Whoever gets it right will be marked brainiest

Mathematics
1 answer:
Brut [27]3 years ago
7 0

Answer:

Probability that Hannah only has to buy 3 or less boxes before getting a prize is 0.784

Step-by-step explanation:

Given, 40% of cereal boxes contain a prize

⇒probability of getting a prize on opening a box, P(A)=0.4

where A is the event of getting a prize on opening a cereal box

and probability of not getting a prize on opening a box, P(A')=1-P(A)=0.6

where A' is the event of not getting a prize on opening a cereal box

This problem needs to be divided into 3 situation:

  • Case 1, Where Hannah gets prize when she buys the first box:

Let K be the event of Hannah winning the prize on buying the first box.

⇒P(K)=P(A)=0.4

  • Case 2, Where Hannah gets prize when she buys the second box:

I<u>n this event Hannah should not get the prize in first box but should get the prize on buying the second box</u>

Let L be the event of Hannah winning the prize on buying the second box

So, P(L)=P(A')·P(A)

           =(0.6)·(0.4)

           =0.24

  • Case 3,Where Hannah gets prize when she buys the third box:

<u>In this event Hannah should not get the prize in first and second box but should get the prize on buying the third box</u>

Let L be the event of Hannah winning the prize on buying the third box

So, P(L)=P(A')·P(A')·P(A)

           =(0.6)·(0.6)·(0.4)

           =0.144

Let N be the event of Hannah winning the prize on buying 3 or less boxes before getting a prize

⇒N=K∪L∪M

Now, Required probability is P(N)=P(K∪L∪M)=P(K)+P(L)+P(M) [As events K,L and M are independent and disjoint events]

⇒P(N)=0.4+0.24+0.144

         =0.784

You might be interested in
Ow many three-letter "words" can be made from 8 letters "FGHIJKLM" if repetition of letters
mrs_skeptik [129]

Answer:

336

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
If x and y vary directly and x=25 when y=100 find x when y=24.<br> PLEASE HELP FASTTTTTTT
Veseljchak [2.6K]

Answer:

x = 6

Step-by-step explanation:

Given that x and y vary directly then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition x = 25 when y = 100 , then

100 = 25k ( divide both sides by 25 )

4 = k

y = 4x ← equation of variation

When y = 24 , then

24 = 4x ( divide both sides by 4 )

6 = x

6 0
3 years ago
Evaluate the Expression :<br> (-2 4/5) + 2 2/3 + (-3 1/2)
denis-greek [22]

−24/5+22/3+−31/2

=38/15+−31/2

=−389/30

7 0
3 years ago
Please need help on this
SashulF [63]

We can Notice that ∠ABC = ∠ACB

We know that if Two Angles are Equal then Angles Corresponding to those Sides are also Equal.

⇒ AB = AC

⇒ 4x + 4 = 6x - 14

⇒ 6x - 4x = 4 + 14

⇒ 2x = 18

⇒ x = 9

⇒ Length of BC = 2x + 7 = 2(9) + 7 = 18 + 7 = 25 units

4 0
3 years ago
Can't anybody help me with this ik math sucks but help
Agata [3.3K]

Answer:

g

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • Order each group of numbers from least to greatest: 4, pi, square root of 8
    7·1 answer
  • 5TH GRADE MATH!!!! PLEASE HELP BRAINLEIST AND 5 STARS!!!!!!!!!!!!!!!!!!!!
    7·2 answers
  • 6x+6y=-6, 5x+y=-13<br>Show your process please<br>Solve the linear equation​
    5·1 answer
  • PLEASE ANSWER ASAPPP
    14·1 answer
  • 1+1+1+1-1-1-1-1+1-1+1+1+1
    8·2 answers
  • Someone please help me!!!!!
    8·1 answer
  • Eight burgers and three orders of fries cost $79.49. Six orders of fries and twelve burgers cost $125.82.Find the price of one b
    5·1 answer
  • How does -5 + 5 equal 0?<br> Explain
    13·2 answers
  • Pls help... 30 pts.. i'm so tired rn-
    10·2 answers
  • Select the ordered pairs that are located 8 units away from the point (2.1).<br><br> Plssss help
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!