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1.) Suppose that average contribution to the company's profit plan is $42.32, with a standard deviation of $8.53. At least what percent of the contributions lie between $22.34 and $62.30?

2.)The mean income of a group of sample observation is $250; the standard deviation is $20. According to Chebyhev's theorem, at least what percent of the incomes will lie between $200 and $300?