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please provide me some explanation, thanks Suppose X1 and X2 are both normally distributed random variable with population mean 7 and population variance 25 .

please provide me some explanation, thanks

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Suppose X1 and X2 are both normally distributed random variable with population mean 7 and population variance 25 . If X1 and X2 are independent, the probability that average of X1 and X2 lies between 5 and 9 is closest or equal to X2 Q 0.2858 0 0.4284 0 0.5716 Q 0.7142

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