Question

a coin is tossed three times . Write the event A of getting wt least two heads and event B of getting no head , wwrite the events A and B . also write. The number of sample points

Answer 1

S: {HHH, HHT, HTH, THH, HTT, THT, TTH, TTT}
A(at least 2 heads): {HHH, HHT, HTH, THH}
B(no head): {TTT}
n(S)= 8
n(A)= 4
n(B)= 1
P(A)= $\frac{4}{8}$= $\frac{1}{2}$
P(B)= $\frac{1}{8}$