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The manager of a store finds that, for a certain brand, 15% of all VCRs sold...

  1. The manager of a store finds that, for a certain brand, 15% of all VCRs sold are returned within a month. Determine the probability that, out of the 500 VCRs sold, more than 90 will be returned within a month.

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Given That:-

The manager of a store finds that, for a certain brand, 15% of all VCRs sold are returned within a month. Determine the probability that, out of the 500 VCRs sold, more than 90 will be returned within a month.

Given,

p = 15%

p = 0.15

n = 500

X = 90

X ~ Bin(n = 500, p = 0.15)

we know,

= 0.9629

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