:a personal computer manufacturer buys 36% of its chips from japan and the rest from the united
a personal computer manufacturer buys 36% of its chips from japan and the rest from the united states. of the japanese chips, 1.7% are defective, and 1.2% of the american chips are defective.
find the probability that a chip is defect-free. (round your answer to four decimal

0.9862

Step-by-step explanation:

Given : The probability that the chips belongs to Japan: P(J)= 0.36

The probability that the chips belongs to United States : P(U)= 1-0.36=0.64

The proportion of Japanese chips are defective : P(D|J)=0.017

The proportion of American chips are defective : P(D|U)=0.012

Using law of total probability , we have

Thus , the probability that chip is defective = 0.0138

Then , the probability that a chip is defect-free=

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have