Question

Mean of 100 observations is 15 and mean of 150 observations is 16. Find mean of 250 observation

Answer 1

Answer:

$\huge{\fbox{\fbox{\orange{\mathfrak{Answer\::18}}}}}$

If the mean =

$\frac{100}{15}$

Also,

$\frac{150}{16}$

Then mean of

$250$

will be,

$\huge{\fbox{\red{\mathfrak{To\:find\::}}}}$

• As every equations are again 50% of the original number, so the given question's answer will be 18 as 100+50=150____[16]

150+50=200_____[17]

200+50=250______[18]

Answer 2

Step-by-step explanation:

mean of 100 observation=15

total of 100 observation=100×15=1500

again, mean of 150 observation=16

total of 150 observation=150×16=2400

now mean of 250 observation=(1500+2400)/250

=3900/250=15.6