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Statistics question

2021 · 22 Jul · Shift 2 · Q41
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Statistics question

2021 · 22 Jul · Shift 2 · Q41

JEE MainMathematicsStatisticsNumerical+4 / −1
Consider the following frequency distribution :

Class : 0-6 6-12 12-18 18-24 24-30
Frequency : aaa bbb 12 9 5

If mean = 30922{{309} \over {22}}22309​ and median = 14, then the value (a −-− b)2 is equal to ‾\underline{\hspace{2cm}}​.
Numerical answer
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