Question

The probability that an entering college student will graduate is 0.6. Determine the probability that out of 10 students

a) At least one will be graduated.

b) Find the mean of graduating student.

Answer 1

a- 0.6/10

b-0.6*n/20

Step-by-step explanation:

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Answer 2

Answer:

Probability that α student graduates=0.4

(i) Probability that none of 3 students graduate=(1−0.4)×(1−0.4)×(1−0.4)

Probability that student (1) doesn't graduate

⇒0.6×0.6×0.6

⇒0.216

∴ Probability that none of 3 students graduate=0.216

(ii) The only one will graduate.

we select one of 3 in

3

C

1

ways

his probability of passing =0.4

remaining two fail⇒0.6×0.6

probability =

3

C

1

×(0.4)×(0.6)×(0.6)

=3×0.4×0.36

Probability that only one will graduate⇒0.432

(iii) Probability that all students graduate=(0.4)(0.4)(0.4)

=0.064

∴ Probability that all will graduate=0.064.

Step-by-step explanation:

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