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Earn +20 ptsQ: What are 3 ways to answer a science question?
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What is the hardest science question?
is there a god. that's the hardest science question!
What are the science questions?
Science questions are science questions.
How many ways can 3 people line up to buy movie tickets?
3*2*1 = 6 ways.3*2*1 = 6 ways.3*2*1 = 6 ways.3*2*1 = 6 ways.
How many ways can a student choose 3 questions from 10 questions?
The first question can be any one of the 10. For each of these . . .The second question can be any one of the remaining 9. For each of these . . .The third question can be any one of the remaining 8.Total number of ways to choose 3 questions = (10 x 9 x 8) = 720 ways.But the same 3 questions can be chosen in any one of 6 sequences.So the number of different sets of 3 questions is only 720/6 = 120 .
How many ways can a student select 7 questions from an exam containing 11 questions if he must answer the last question?
If he must answer the last question, he effectively needs to select 6 from 10. This can be done in 10C6 = 10*9*8*7/(4*3*2*1) = 210 ways.
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