In a class of 30 students with a 1:1 gender ratio, how many 1 girl-1 boy pairs can be made on a given day if 3 girls are on leave? and explain it please
Answers
Answer:
Solution
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Correct option is A)
Number of ways of selecting 2 students from 30 students = 30C2 ways
= ( 30 x 29 )/2
= 15 x 29 ways
Number of ways of selecting 2 girls from 12 girls = 12C2 ways
= 12 x 11 / 2
= 6 x 11
Thus, probability that both selected students are girls
= ( 6 x 11 ) / ( 15 x 29 )
= 22 / 145
Explanation:
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Answer:
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Explanation:
Anshuman Barrowed Rs 30000 from a bank at 12% per annum simple interest. He then lent it to his friend Pranav at the same rate but compounded annually. find his gain after third year.