plz solve 7th and 8th
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Answered by
2
7th answer is 56.4
solution :
no of numbers =7
they given that
mean is 50.
but we should know
about sum of numbers .
so 7*50=350.
they given that
72 is mistaken as27
so,
72-27=45
now we should
add 45to 350
total is 395.
now mean of
7numbers=
395/7
=56.4
done...
I hope it helps you.
solution :
no of numbers =7
they given that
mean is 50.
but we should know
about sum of numbers .
so 7*50=350.
they given that
72 is mistaken as27
so,
72-27=45
now we should
add 45to 350
total is 395.
now mean of
7numbers=
395/7
=56.4
done...
I hope it helps you.
Answered by
2
2.(b) What is the highest marks?
95
2.(c) calculate the mean marks?
arithmetic mean=72+93+52+95+56+65+69+73+42+77+86+49+80+72+55/15(count the total numbers given.there are 15 numbers)
=1036/15
=69.0666
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