Question

If the mode of following data 10, 11, 12, 10, 15, 14, 15, 13, 12, x, 9, 7 is 15 then find the value of x

Answer 1

Ascending order: 7,9,10,10,11,12,12,13,14,15 & x.
Since mode is the most repeated value,
X = 15. ( Since, 10 & 13 already repeated twice then 15 should be repeated thrice to become the mode. This is ungrouped data and there is no need of a formula and can be answered easily.)