PDF chapter test TRY NOW
1. If the mean of the following data is \(20.2\), then find the value of \(p\).
| Marks | \(10\) | \(15\) | \(20\) | \(25\) | \(30\) |
| No. of students | \(6\) | \(8\) | \(p\) | \(10\) | \(6\) |
Answer:
\(p =\)
2. In the class, weight of students is measured for the class records. Calculate mean weight of the class students using Direct method.
| Weight in \(kg\) | \(15 - 25\) | \(25 - 35\) | \(35 - 45\) | \(45 - 55\) | \(55 - 65\) | \(65 - 75\) |
| No. of students | \(4\) | \(11\) | \(19\) | \(14\) | \(0\) | \(2\) |
Answer:
Mean \(=\) \(kg\)
(Note: Round off the answer to \(1\) decimal place.)
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