Find the value of x. Round to the nearest degree. Explain step by step
1 answer:
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The total number of ways of picking r objects out of n, is given by the formula:
where a! is "a factorial", defined as a!=1*2*3*...*(a-1)*a
We are picking 15 objects (questions) out of 20, so substitute r=15 and n=20 in the formula:
Answer: A
where a! is "a factorial", defined as a!=1*2*3*...*(a-1)*a
We are picking 15 objects (questions) out of 20, so substitute r=15 and n=20 in the formula:
Answer: A