Question

21. Arithmetic mean of six observations is 32, if one more observation 39 is
added then new mean is *
O 33
O 34
O 35
O none​

Answer 1

Answer:

Ans. 33

Step-by-step explanation:

Let sum of old bservations be x

and sum of New observations be (x+39)

old mean : x/6= 32

therefore after cross multiplying : x = 192 ie 33*6

now new mean :

number of observations 7

sum of observations is 192+39 = 231

new mean = (sum of observations/ number of observations)

(231/7) = 33

Hence answer is 33