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Mathematics · 2026 · 5 marks

CBSE 2026 · Region 5 · Set 3 · Q33

(a)
The mean of the following distribution is $\displaystyle 53$ . Find the missing frequency p. Class Interval : $\displaystyle 0$-$\displaystyle 20$ $\displaystyle 20$-$\displaystyle 40$ $\displaystyle 40$-$\displaystyle 60$ $\displaystyle 60$-$\displaystyle 80$ $\displaystyle 80$-$\displaystyle 100$ Frequency : $\displaystyle 1215$ p $\displaystyle 2813$ Hence, find mode of the distribution.
(b)
Compute median of the following data :
Mid-value :$\displaystyle 115$$\displaystyle 125$$\displaystyle 135$$\displaystyle 145$$\displaystyle 155$$\displaystyle 165$$\displaystyle 175$
Frequency :$\displaystyle 12$$\displaystyle 15$$\displaystyle 20$$\displaystyle 16$$\displaystyle 10$$\displaystyle 16$$\displaystyle 11$

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