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Mathematics · 2022 · 3 marks
CBSE 2022 · Region 1 · Set 1 · Q10
Following is the daily expenditure on lunch by 30 employees of a company: Find the mean daily expenditure of the employees.
Following is the daily expenditure on lunch by $\displaystyle 30$ employees of a company :
Find the mean daily expenditure of the employees.
| Daily Expenditure (in Rupees) | Number of Employees |
| $\displaystyle 100$-$\displaystyle 120$ | $\displaystyle 8$ |
| $\displaystyle 120$-$\displaystyle 140$ | $\displaystyle 3$ |
| $\displaystyle 140$-$\displaystyle 160$ | $\displaystyle 8$ |
| $\displaystyle 160$-$\displaystyle 180$ | $\displaystyle 6$ |
| $\displaystyle 180$-$\displaystyle 200$ | $\displaystyle 5$ |
Marking-scheme solution
| Class | $\displaystyle \boldsymbol{x}$ | $\displaystyle f$ | $\displaystyle d$ | f.d |
| $\displaystyle 100$-$\displaystyle 120$ | $\displaystyle 110$ | $\displaystyle 8$ | -$\displaystyle 40$ | -$\displaystyle 320$ |
| $\displaystyle 120$-$\displaystyle 140$ | $\displaystyle 130$ | $\displaystyle 3$ | -$\displaystyle 20$ | -$\displaystyle 60$ |
| $\displaystyle 140$-$\displaystyle 160$ | $\displaystyle 150$ | $\displaystyle 8$ | $\displaystyle 0$ | $\displaystyle 0$ |
| $\displaystyle 160$-$\displaystyle 180$ | $\displaystyle 170$ | $\displaystyle 6$ | $\displaystyle 20$ | $\displaystyle 120$ |
| $\displaystyle 180$-$\displaystyle 200$ | $\displaystyle 190$ | $\displaystyle 5$ | $\displaystyle 40$ | $\displaystyle 200$ |
| $\displaystyle 30$ | -$\displaystyle 60$ |
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CBSE Class 10 Mathematics past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.