3 years ago

Two numbers have the ratio 7:5. Their difference is 12.Find the numbers.

Mathematics

1 answer:

cupoosta [38]3 years ago

3 0

Answer:

42 and 30

Step-by-step explanation:

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The variance of the probability distribution is given by

$Var(x)=(x-\bar{x})^2p(x) \\ \\ =(0-0.56)^2(0.53)+(1-0.56)^2(0.40)+(2-0.56)^2(0.05)\\+(3-0.56)^2(0.02) \\ \\ =(-0.56)^2(0.53)+0.44^2(0.40)+1.44^2(0.05)+2.44^2(0.02) \\ \\ =0.3136(0.53)+0.1936(0.40)+2.0736(0.05)+5.9536(0.02) \\ \\ =0.166208+0.07744+0.10368+0.119072=0.4664$

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3 years ago

Two numbers have the ratio 7:5. Their difference is 12.Find the numbers.​

Two numbers have the ratio 7:5. Their difference is 12.Find the numbers.