Q9 of 55 Page 364

If the mean of numbers 6, 7, x, 8, y, 14 is 9, then

Mean is given by adding the data values or variables and dividing them by the number of data values or variables.


So,


⇒


⇒ 54 = 35 + x + y


⇒ 54 – 35 = x + y


⇒ x + y = 19


Thus, option (B) is correct.

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