Methods2024 NHT Exam 2 Section A · Q5CAS active1 mark

Binomial probability expression for coin tosses

When a biased coin is tossed, the probability of the coin landing on heads is $0.25$ . The coin is tossed $10$ times and the number of heads is recorded.

The probability that exactly $x$ heads are recorded is

1 mark

\binom{10}{x}(0.25)^{10-x}(0.75)^{x}

\binom{10}{x}(0.25)^{x}(0.75)^{10-x}

\binom{10}{x}(0.25)^{10-x}(0.75)^{10}

\binom{10}{x}(0.25)^{x}(0.75)^{10}

\binom{10}{x}(0.25)^{10}(0.75)^{10-x}

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