Question 1173542
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Hi,
There are _____ways that a student can answer the exam with 7 correct answers and 8 incorrect answers.
15 Questions:  7correct, 8 incorrect
Using Combinations (nCr)  on Calculator:
 Best not to over think it.
Yes, (15C7)= 6435  ways a student can answer the exam with <u> 7 correct answers</u> out of 15 questions. (others could have had no answer)
Wish You the Best in your Studies.