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A die is rolled 11 times. Find the probability of rolling exactly 1 six.? How many grams of salt in 200mg? Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If P( −b < z < b)= 0.1264, find b.? Explain the formation of line spectrum in the Balmer series of hydrogen atom? Find the area of the region y=1/(x^2), y=64x and y=8x?