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ruslelena [56]
3 years ago
5

Which number is a factor of 20 and also a prime number?

Mathematics
2 answers:
Alchen [17]3 years ago
7 0
The answer is 5 because, 20= 5*4 then 4= 2*2, from these options 5 is the answer
klio [65]3 years ago
4 0
20 = 2<span> x </span>2<span> x </span>5<span>, which can also be written 20 = 2² x </span><span>5
thus B is your Answer.</span>
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andreev551 [17]

The fraction of a defective item getting by both inspectors is \frac{5}{100} = \frac{1}{20}

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Step 1; Assume that the probability of the first inspector missing a defective part is P(A) and the probability of the second inspector missing those that do get past the first inspector is P(B).

Step 2; It is given that P(A) = 0.1, we convert this into a fraction so that the final probability will be a fraction and not a decimal.

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Step 3; To calculate the probability of both inspectors missing a defective part, we multiply both the probabilities.

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