The mean of certain no. Of items is 62. If an observation 97 is added to the data mean becomes 67. Find bo. Of items in original data
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Answer: 6
Step-by-step explanation:
Let original no. of items be x
sum = mean * no. = 62 * x
New sum = (62*x + 97 ) = 67(x + 1)
=> 97 - 67 = 5x
=> x = 6
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