1.

If the mean of a numbers 2, 6, 7 andat is 15 and also mean of other 5numbers 6, 18, 1, a, b is 5o. What isthe value of 'b'​

Answer»

Answer:

Mean = sum of OBSERVATIONS / no. of observations

15 = (2 + 6 + 7 +a)/4

15 = (15 + a) / 4

15 x 4 = 15 + a

60 – 15 = a

a = 45

Similarly, Mean = sum of observations / no. of observations

50 = (18 + 6 + 1 +a + B)/5

50 = (18 + 6 + 1 +45 + b)/5

50 = (70 + b)/5

250 = 70 + b

b = 250 – 70 = 180

So,

The value of b = 180.

Step-by-step explanation:


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