Question

In a class of 28 students, 11 have a brother and 9 have a sister. There are 2 students

who have a brother and a sister. What is the probability that a student has a sister
given that they have a brother?
Can someone help me

Answer 1

x=3

Explanation:

Answer 2

7%

Explanation:

well since only 2 students have both a brother and a sister it would be 2/28

which as a percentage is 0.07142857142 × 100 = 7.14285714286