Question

When buying a candy bar, there is a 20% chance that it will also include a coupon for a second candy bar. A student

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

• To estimate the probability that more than 2 out of 7 candy bars will include a coupon, the student must count the number of trials with more than two 1's. and divide by the number of trials.

• This gives an estimated probability of about 0.1875.

Step-by-step explanation:

1 represent a candy bar with a  coupon and numbers 2 through 5 represent a candy bar without a coupon.

Now we are asked to find the probability that, if she buys 7 candy bars, more than 2 will include a coupon.

Total number of outcomes=16

Number of favorable outcomes(i.e. the outcome which have more than 2 one) = 3

( Since the outcomes are:  2113415 4341112   1455141 )

Hence, the probability is the ratio of Number of favorable outcomes to the total number of outcomes.

i.e.  $Probability=\dfrac{3}{16}\\\\\\Probability=0.1875$