Question

the mean of 7 observation is 25 the mean of first four observation is 23 and the mean of last four observations is 29 find the fourth observation​

Answer 1

Answer:

HEY MATE,

HERE'S YOUR ANSWER.

We know : Mean = Sum of observations/Number of observations,

So,

Sum of seven observations = 25 × 7

= 175

and

Sum of first four observations = 23 × 4

= 92

And

Sum of last four observations = 29 × 4

= 116

So, Total of first four observations +

Total of last four observations

= 92 + 116

= 208

ATQ

175 + 4th observation = 208

or, 4th observation = 208 - 175

or 4th observation = 33

Answer:- 33

Hope this information will clear your doubts about topic✌✌✌✌✌✌

Answer 2

Answer is 33

Step-by-step explanation:

Mean of seven observations = 25

Therefore, Sum of seven observations = 7×25=175

Mean of first four observations = 23

Therefore, Sum of first four observations = 4×23=92

Also, mean of last four observations = 29

Therefore, Sum of last four observations = 4×29=116

Since, the fourth observations occurs twice.

Therefore, The fourth observation = 92+116-175

= 208-175=33