A purchaser of alarm clocks buys them in lots of size 10. It is his policy to inspect 3 clocks randomly from a lot and to accept the lot only if all 3 are nondefective. If 30 percent of the lots have 4 defective clocks and 70 percent have only 1, what proportion of lots does the purchaser reject?
A purchaser of alarm clocks buys them in lots of size 10. It is his policy to inspect 3 clocks randomly
from a lot and to accept the lot only if all 3 are nondefective. If 30 percent of the lots have 4 defective
clocks and 70 percent have only 1, what proportion of lots does the purchaser reject?
Define the Events,
A : The lot have 4 defectives
B : The lot have 1 defective
C : The lot purchaser rejects the lot.
Proportion of lots having 4 defectives , P(A) = 30% = 0.3
Proportion of lots having 1 defective, P(B) = 70% = 0.7
By his policy he inspects 3 clocks randomly from a lot and to accept the lot only if all 3 are non defective.
If lot have 4 defectives then the probability that lot is accepted =
If the lot have 1 defective then the probability that lot is accepted =
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