A student is to answer seven out of 10 questions on an examination. In how many ways

Question:

A student is to answer seven out of 10 questions on an examination. In how many ways can he make his selection if
(a) There are no restrictions?
(b) He must answer the first two questions?
(c) He must answer at least four of the first six questions?
Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Question Posted: