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प्रश्न
Two coins are tossed once. Find the probability of getting 2 heads.
उत्तर
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`.
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| Sr. No. | Random experiment | Sample space | Number of sample points in S |
| 1. | One coin is tossed. | S = {H, T} | n(S) = `square` |
| 2. | Two coins are tossed. | S = `square` | n(S) = `square` |
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