# Q.1 There are 50 numbers .Each number is subtracted from 53 and the mean of the numbers so obtained is -3.5.find the mean of given number?????????????

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given each no. is subtracted from 53

the new no.s are 53-x1, 53-x2,.......................,53-x50

the mean of these new no. is -3.5

(53-x1+53-x2+53-x3+.............+53-x50)/50 = -3.5

2650-(x1+x2+..........+x50)=-175

x1+x2+..............+x50 = 2825

mean of the original no.s = 2825/50 = 56.5