| Marks obtained: | 140-150 | 150-160 | 160-170 | 170-180 | 180-190 | 190-200 |
| No. of girls: | 4 | 6 | 10 | 18 | 9 | 3 |
| X | M.V. (m) | f | dx | dx'(dx/i) | fdx' | |dx| | f|dx| |
| 140-150 | 145 | 4 | -20 | -2 | -8 | 26.6 | 104.8 |
| 150-160 | 155 | 6 | -10 | -1 | -6 | 16.2 | 97.2 |
| 160-170 | 165 | 10 | 0 | 0 | 0 | 6.2 | 62.0 |
| 170-180 | 175 | 18 | 10 | 1 | 18 | 3.8 | 68.4 |
| 180-190 | 185 | 9 | 20 | 2 | 18 | 13.8 | 124.2 |
| 190-200 | 195 | 3 | 30 | 3 | 9 | 23.8 | 71.4 |
| $\Sigma\text{f}=50$ | $\Sigma\text{fd}'=31$ | $\Sigma\text{f|dx|}=528.0$ |
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
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C.I.
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10-20
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20-30
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30-40
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40-50
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50-60
|
|
f
|
5
|
17
|
31
|
41
|
49
|
| Commodity | Base Year | Current Year | ||
| Price (₹) | Quantity | Price (₹) | Quantity | |
| A | 2 | 10 | 4 | 5 |
| B | 5 | 12 | 6 | 10 |
| C | 4 | 20 | 5 | 15 |
| D | 2 | 15 | 3 | 10 |
|
Items
|
A
|
B
|
C
|
D
|
E
|
|
Prices ₹ (2015)
|
6
|
2
|
4
|
10
|
8
|
|
Prices ₹ (2016)
|
10
|
2
|
6
|
12
|
12
|
|
Prices ₹ (2017)
|
15
|
3
|
8
|
14
|
16
|
| Price (R) | Ram (Units) | Sohan (Units) | Mohan (Units) | Market Demand (Units) |
| 3 | 7 | (i) | 8 | 20 |
| 4 | 6 | 4 | (ii) | 16 |
| 5 | 4 | 3 | 3 | (iii) |
| 6 | (iv) | 2 | 1 | 5 |
(Assumption: Market includes three buyers.) Calculate the missing entries.