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Re: Ten students wrote a test, and the distribution of scores is shown on [#permalink]
Expert Reply
Average is 62.
So, [(40*1)+ (55*2) + (70*3) + (x*4)]/(1+2+3+4) = 62
So, 360+4x = 620
So, x = 65

Hence option (B).
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Re: Ten students wrote a test, and the distribution of scores is shown on [#permalink]
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