the length of pregnancy terms for a particular species of animals are nearly normally distributed about a mean pregnancy length with standard deviation of 18 days. About what percentage of births would be expected to occur within 54 days of the mean pregnancy length?

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a diamond or heart. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability of randomly selecting a diamond or heart or club. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability of randomly selecting queen or club. (type an integer or a decimal rounded to three decimal places as needed.)