4 years ago

If four times a certain number, increased by 6 is equal to 49, what is the number

Mathematics

1 answer:

Studentka2010 [4]4 years ago

6 0

Answer:

Step-by-step explanation:

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$C(5,4)(.40)^4(1-.40)^1=5(.4)^4(.6)^1=0.0768$

That's 7.68% = 7.7% (rounded)

Note: C(5, 4) is the number of combinations of 5 things taken 4 at a time. You may have seen this written as $_5C_4$

In general, $C(n,r)=\frac{n!}{r!(n-r)!}$

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