Out of 9 outstanding students in a college, there are 4 boys and 5 girls. A team of 4 students is to be selected for a quiz program. Find the probability that 2 are boys and 2 are girls
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outcomes
4+0; 1+3; 2+2; 3+1; 0+4
[Where in eq a+b, a is no: of possible girls and b is no: of girls
Favourable outcomes
2+2
Hence
P(E) = 1/5
4+0; 1+3; 2+2; 3+1; 0+4
[Where in eq a+b, a is no: of possible girls and b is no: of girls
Favourable outcomes
2+2
Hence
P(E) = 1/5
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Answer:
For two boys = 2/4 = 1/2
For two girls = 2/5
1/2 + 2/5
5 + 4/ 10
9/10 = 0.9
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