2 years ago

Calculate the missing number7:3=?:9

1 answer:

7 0

Answer:

I think

63=3x

x=63÷3

x=21

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xeze [42]

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SOVA2 [1]

Answer:0.565

Step-by-step explanation:

Hat contain 100 coins out of which 99 is fair and one is double headed.

Probability of getting 7 heads is sum of Head through fair coin+heads through biased coin

Probability of getting a head through a fair coin=0.5

$P(7 heads)=0.99\times 0.5^7+0.01\times 1$

$P(Double head |7 heads )=\frac{Probability\ of\ 7\ heads\ and\ double\ headed}{probability\ of\ 7\ heads}$

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2 years ago

Katyanochek1 [597]

$\frac{31}{8}=\frac{24}{8}+\frac{7}{8}=3+\frac{7}{8}=\boxed{3 \frac{7}{8}}$

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3 years ago

Calculate the missing number7:3=?:9​