A fair die is rolled 10 times. What is the probability that an odd number (1,...

Question

Question

A fair die is rolled 10 times. What is the probability that an odd number (1, 3 or 5) will occur less than 3 times?

A. .0547
B. .1172
C. .1550
D. .7752
E. .8450

math Statistics-And-Probability

Answer 1

Answer #1

A. .0547

Answer 2

Answer #2

(1/2)^10 + 10C1*(1/2)*(1/2)^9 + 10C2*(1/2)^2*(1/2)^8 = 0.0547

Option A

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Answer 3

Answer #3

10 C 3 + 10 C2 + 10 C 1 * 1/2^10

= (120+45+10) / 2^10

= 175/1024
= 0.17089

Answer 4

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