Question

Two coins are tossed once. Find the probability of getting 2 heads.

Answer 1

If two coins are tossed once, then
S = {HH, HT, TH, TT}
⇒ N(S) = 4.

E: getting two heads
∴ N(E) = 1
∴ P(E) = `"N(E)"/"N(S)" = 1/4`.