Question

There are 60 students in a class among which 30 are boys. In another class there are 50 students among which 25 of them  are boys. If one from each class is selected
(a) What is the probability of both being girls ?
(b) What is the probability of having atleast one girl?​

Answer 1

Answer:

a) P(E)=1/4=0.25

b) P(E)=3/4=0.75

Step-by-step explanation:

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Answer 2

Answer:

P(both being girls) = 1/4

P(having at least one girl)=3/4

Step-by-step explanation:

a} In class 1

P (girls) =30/60

=1/2

In class 2

p(girls) =25/50

= 1/2

P (both being girls) =1/2×1/2

= 1/4

B} P (having at least one girl)= 3/4