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Mathematics · 2022 · 3 marks
CBSE 2022 · Region 1 · Set 3 · Q10
The following table gives the production yield of wheat of farms of a village: Find the mean production yield, using assumed mean method.
The following table gives the production yield of wheat of farms of a village :
Find the mean production yield, using assumed mean method.
| Production Yield (in kg / ha) | $\displaystyle 50$-$\displaystyle 60$ | $\displaystyle 60$-$\displaystyle 70$ | $\displaystyle 70$-$\displaystyle 80$ | $\displaystyle 80$-$\displaystyle 90$ | $\displaystyle 90$-$\displaystyle 100$ |
| Number of Farms | $\displaystyle 7$ | $\displaystyle 12$ | $\displaystyle 11$ | $\displaystyle 8$ | $\displaystyle 2$ |
Marking-scheme solution
| Class | \(\displaystyle X\) | \(\displaystyle f\) | \(\displaystyle d=x-75\) | f.d |
| $\displaystyle 50$-$\displaystyle 60$ | $\displaystyle 55$ | $\displaystyle 7$ | -$\displaystyle 20$ | -$\displaystyle 140$ |
| $\displaystyle 60$-$\displaystyle 70$ | $\displaystyle 65$ | $\displaystyle 12$ | -$\displaystyle 10$ | -$\displaystyle 120$ |
| $\displaystyle 70$-$\displaystyle 80$ | $\displaystyle 75$ | $\displaystyle 11$ | $\displaystyle 0$ | $\displaystyle 0$ |
| $\displaystyle 80$-$\displaystyle 90$ | $\displaystyle 85$ | $\displaystyle 8$ | $\displaystyle 10$ | $\displaystyle 80$ |
| $\displaystyle 90$-$\displaystyle 100$ | $\displaystyle 95$ | $\displaystyle 2$ | $\displaystyle 20$ | $\displaystyle 40$ |
| $\displaystyle 40$ | -$\displaystyle 140$ |
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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.