Question

there are 60 students In a class among with 30 are boys in a class there are 50 students among which are 25 of them are boys if one from each class selected first what is the probability of both the angles second what is the probability of having at least one girl​

Answer 1

Answer:

Step-by-step explanation:

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

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

Step-by-step explanation:

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Answer 2

The probability of both being girls is 0.25.

The probability of at least on girl is 0.75.

Step-by-step explanation:

Consider the provided information.

In class 1:

Total  Students are 60

Number of Boys = 30

Number of Girls = 60 - 30 = 30

In Class 2:

Total  Students are 50

Number of Boys = 25

Number of Girls = 50 - 25 = 25

One from each class is selected,

Part (A):

Probability of both being girls  = $\frac{30}{60}\times\frac{25}{50}=\frac{1}{4}=0.25$

Hence, the probability of both being girls is 0.25.

Part(B):

Probability of having at-least one girl  = 1  - Probability of both Boys

$P= 1 - \frac{30}{60}\times\frac{25}{50}\\=1-\frac{1}{4}\\=\frac{3}{4} \\=0.75$

Hence, the probability of at least on girl is 0.75.

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