Three equally weighted coins are tossed. What are the chances of receiving at least two heads?
A. 3/4
B. 1/4
C. 3/8
D. 7/8
Answer:D
Three equally weighted coins are tossed. What are the chances of receiving at least two heads?
A. 3/4 B. 1/4 C. 3/8 D. 7/8
Explanation: S = TTT, TTH, THT, HTT, THH, HTH, HHT, HHH, THH, THH, THH, THH, THH, THH, THH, THH, THH, THH, THH, THH, THH,Let E denote the occurrence of at least two heads.Then E = TTT, TTH, THT, HTT, THH, HTH, HHT, HTT, THH, HTH, HHT.n(E)/n(S) = 7/8 P(E) = n(E)/n(S)