Question

$6) The mean height of 30 plants in a field is 32.5 cm and mean height
of 50 plants in second field is 54 cm. What will be mean height of 80
plants of both fields?
(2016)
(a) 43.25 (b) 45.93 (c) 44.53 (d) None of these
plz properly explain this problem​

Answer 1

Step-by-step explanation:

Option ----{D} None of above...

Hope it's helpful......

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Answer 2

(a) 43.25 cm.

Step-by-step explanation:

According to the given information, the mean height of 30 plants n a field is 32.5 cm and mean height of 50 plants in second field is 54 cm. We need to find the mean height of 80 plants of both fields.

Mean height of (30 plants in first field+50 plants in second field) 80 plants in both fields = (Mean height of plants of first field + Mean height of plants of second field)/2 = $\frac{32.5 + 54}{2}$ = 43.25 cm.

Hence, mean height of 80 plants of both fields = 43.25 cms.

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