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4-7 On the basis of past experience, the buyer for a large sports store estimates that the number of 10-speed bicycles sold n

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(a) x, Mean = Ex * PCX) 40*0.05 +0:15 * 50 +0:41 * 60 +70* 0.34 + 80*0.04 + 90*0.01. Q + 7.5 + 84.6 + 23.8 +3.2 +0.9 62 Ans _

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