solve q no. 18 ,19 ,and20 faat
Attachments:
Answers
Answered by
2
i'll not say u d direct ans but will help u in solving it,
because god helps those who helps themselves.
so for question 18,
cross multiply the RHS and then convert it into sec n cosec and then simplifing it . after doing this u will get the ans.
for question 19,
a) first take out the class mark(xi) i.e. UP+LL/2
THEN multiply it with the respective frequency (fi)
then u will get (xifi) of different class intervals so add them all so u will get the total of xifi
then add all the frequency so u will get the total of (fi)
THEN to get mean do this..... xifi/fi
after doing this u will get the ans of Q19 a &b
for Q20
use the formula
LL+(Fm-CF/2Fm-f1-f2)h
here Fm is the higest frequency
f1 is the frequency above the higest frequency n
f2 is the frequency below the higest frequency.
input the values n u will get the answers.
if due tomy hint u r able to solve the ans then mark it as brainliest
because god helps those who helps themselves.
so for question 18,
cross multiply the RHS and then convert it into sec n cosec and then simplifing it . after doing this u will get the ans.
for question 19,
a) first take out the class mark(xi) i.e. UP+LL/2
THEN multiply it with the respective frequency (fi)
then u will get (xifi) of different class intervals so add them all so u will get the total of xifi
then add all the frequency so u will get the total of (fi)
THEN to get mean do this..... xifi/fi
after doing this u will get the ans of Q19 a &b
for Q20
use the formula
LL+(Fm-CF/2Fm-f1-f2)h
here Fm is the higest frequency
f1 is the frequency above the higest frequency n
f2 is the frequency below the higest frequency.
input the values n u will get the answers.
if due tomy hint u r able to solve the ans then mark it as brainliest
Similar questions