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A manufacturer produces bowling balls with a mean weight of µ = 8.2 lbs and a...

A manufacturer produces bowling balls with a mean weight of µ = 8.2 lbs and a standard deviation of s = 0.4 lbs. Assume that the weights are normally distributed (5 pts each):

      a) what proportion of the bowling balls weigh less than 7.9 lbs?
                                                                                                                             
      b) what is the probability that a randomly selected ball weighs more than 8 lbs?

      c) what percent of the balls are between 7.5 lbs and 8.5 lbs?

d) if the production for a year totals 1,800 balls, how many are between 7.5 and 8.5 lbs?

math   Statistics-And-Probability   
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could you plese send d bit asa another question thank you

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