Question

A class has five students what is the probability that four of the students were born on a weekday

Answer 1

0.3718688642

Explanation:

Weekdays consist of 5 days and weekends consists of 2 days. ... In case if you do not know, there are 7 days in a week.

The probability of one student who were born on a weekday

= 5/7

The probability of one student who were born on a weekend

= 2/7

This question then can be solved by using the binomial distribution formula,

`P(X = 4) = \binom{5}{4} { ((5)/(7)) }^(4) {( (2)/(7)) }^(1) \\ = 0.3718688642`