The mean weight of a class of 34 students is 46.5 kg. If weight of the teacher is included, the mean rises by 500 gm. Then weight of the teacher is:

175 kg

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62 kg

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64 kg

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72 kg

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Solution

The correct option is C 64 kg
$A T Q$
$47 = \frac{46.5 \times 34 + T}{35}$
$16454 = 1581 + T$
$T = 1645 - 1581$
$T = 64$

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The mean weight of a class of 34 students is 46.5 kg. If weight of the teacher is included, the mean rises by 500 gm. Then weight of the teacher is:

The correct option is C 64 kgATQ47=46.5×34+T3516454=1581+TT=1645−1581T=64

The correct option is C 64 kg
$A T Q$
$47 = \frac{46.5 \times 34 + T}{35}$
$16454 = 1581 + T$
$T = 1645 - 1581$
$T = 64$