1.

A student is instructed to answer 8 out of 12 questions. i. How many differnet ways can he choose the questions? ii. How many different ways can he choose the questions so that question number 1 will be included? iii. How many different ways can he choose the questions so that question number 1 will be included and question number 10 will be excluded?

Answer»


ANSWER :i. 495
II. 330
iii. 120


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