An unbiased coin is tossed three times.the expected value of the number of heads is (a)2.5 (b)1.0 (c)1.5 (d)2.0

Anju · 7 Dec 2023

1.5

Raj · 6 Dec 2023

X : 0 1 2 3 P(x) : 1/8 3/8 3/8 1/8 E(x) = Σx. P(x) = 0(1/8) + 1(3/8) + 2(3/8) + 3(1/8) = 12/8 = 1.5

Akshita · 6 Dec 2023

1.5

Kushal · 6 Dec 2023

1.5

Angel · 6 Dec 2023

Please explain

Abhi · 6 Dec 2023

1.5