The average of 5 results is 46 and that of first 4 is 45.The fifth result is (a)1 (b)10 (c)12.5 (d)50
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Hello, Originally Posted by devi The average of 5 results is 46 and that of first 4 is 45.The fifth result is (a)1 (b)10 (c)12.5 (d)50 The average of 5 results is given this way : , where a,b,c,d,e are the results. In general, you divide the sum of the results by the number of results. We know that the sum of the first 4 is 45, let's say a+b+c+d=45 and that the average is 46. Solve for e...
e+45=46 46-45=e e=1
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