Published by:
CGP EDU Academic Team
Published on: August 13, 2026
A car hire firm has 2 cars which it hires out day by day. The number of demands for a car on each day is distributed as a P.D. with mean 1.5. Then the proportion of days on which the demand is refused is (e -1.5 = 0.2231)
Text Solution
Verified by ExpertsThe correct answer is:
D
λ λ = 1.5
X = {0, 1, 2, 3, ----- ∞ ∞ }
P(X>2) = 1-[P(X=0) + P(X=1) +P(X=2)
= 1 - (0.2231 + 1.5 x 0.2231 + 
x 0.2231)
= 1 - 0.2231 (1 + 1.5 + 1.125)
= 1 - 3.625 x 6.2231
= 1 - 0.8087
= 0.2177
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