didirose
05.05.2020 •
Mathematics
Aron flips a penny 9 times. Which expression represents the probability of getting exactly 3 heads?
P (k successes) = Subscript n Baseline C Subscript k Baseline p Superscript k Baseline (1 minus p) Superscript n minus k. Subscript n Baseline C Subscript k Baseline = StartFraction n factorial Over (n minus k) factorial times k factorial EndFraction
Subscript 9 Baseline C Subscript 3 Baseline (0.5) cubed (0.5) Superscript 6
Subscript 9 Baseline C Subscript 3 Baseline (0.5) cubed
Subscript 9 Baseline C Subscript 3 Baseline (0.5) cubed (0.5) Superscript 9
Subscript 9 Baseline C Subscript 6 Baseline (0.5) Superscript 6
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Ответ:
120
Step-by-step explanation:
The number of ways the gold can be awarded is 6
The number of ways the silver can be awarded is 5
And the number of ways the bronze can be awarded is 4
6 * 5 * 4 = 120