Question

EXERCISE 34(A)
1. Find the mean of:
(ii) 12, 9, 6, 11 and 17
(1) 7, 10, 4 and 17
(iv) 7,5, 0, 3, 0,6, 0, 9, 1 and 4
(W) 3, 1, 5, 4, 4 and 7
(1) 2-1, 4-5, 5-2, 7.1 and 93
(vi) 5, 2-4, 6-2, 8-9, 4.1 and 3.4
2. Find the mean of:
O first eight natural numbers
(ii) first six even natural numbers
(ii) first five odd natural numbers (iv) all prime numbers upto 30
(v) all prime numbers between 20 and 40.
3. Heights (in cm) of 7 boys of a locality are 144 cm, 155 cm, 168 cm, 163 cm, 167
151 cm and 158 cm. Find their mean height.
4. Find the mean of 35, 44, 31, 57, 38, 29, 26, 36, 41 and 43.
5. The mean of 18, 28, 32, 14 and 36 is 23. Find the value of x.
6. If the mean of XX+2
+ 4 X + 6 and x + 8 is 13 find the value of X.
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Answer 1

Step-by-step explanation:

hey mate

here

1(i) To find the mean

apply the formula

Sum of the of the observation

Number of observation

u can solve all the problems by this formula only

hope it helps

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