A student is to answer 10 out of 13 ques. ,an examination such ythat he must choose at least 4 from the first 5 ques. The no. of choices available to him is-

Question

shubham sharma · Answer

its 196 from 1st 5 he can choose 4 or5 questions so 5C4.8C6 + 5C5.8C5

jitender lakhanpal · Answer

there would be two cases

1) when 4 is selected from first five and rest 6 from remaining 8

we can do it by 5C4 * 8C6

2) when all 5 are selected from first 5 and rest 5 from remaining 8

5C5 * 8C5

add both of them you will get the answer

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Shubham Nikat · Answer

Why 5C4×9C6 is not giving the correct answer. As the student can choose any four out of the first five questions. Then the one left out of this selection and other remaining 8 questions makes available 9 choices for selecting another 6 questions.

Rishi Sharma · Answer

Dear Student,
Please find below the solution to your problem.

there would be two cases
1) when 4 is selected from first five and rest 6 from remaining 8
we can do it by 5C4 * 8C6
2) when all 5 are selected from first 5 and rest 5 from remaining 8
5C5 * 8C5
add both of them you will get the answer

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A student is to answer 10 out of 13 ques. ,an examination such ythat he must choose at least 4 from the first 5 ques. The no. of choices available to him is-

A student is to answer 10 out of 13 ques. ,an examination such ythat he must choose at least 4 from the first 5 ques. The no. of choices available to him is-

4 Answers

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A student is to answer 10 out of 13 ques. ,an examination such ythat he must choose at least 4 from the first 5 ques. The no. of choices available to him is-

A student is to answer 10 out of 13 ques. ,an examination such ythat he must choose at least 4 from the first 5 ques. The no. of choices available to him is-

4 Answers

Think You Can Provide A Better Answer ?

Other Related Questions on Algebra

ASK QUESTION

Answer and earn gift vouchers

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