i-39

Calculate the mean for the following data {:("C.I.",30-34,35-39,40-44,45-49,50-54,),("F"," "2," "5," "6," "5," "2,):}

Simplify: (i) (-4/7) xx (21/20) , (ii) (-13)/9 xx (-21)/(-39)

I. 16x^2-40x-39=0 II. 12y^2-113y+255=0

The number of values of r satisfying the equation,39C_(3r-1)-39C_(r^(2))=39C_(r^(2)-1)-39C_(3r) is :

(i) 26/(39), (ii) (16)/(72) (iii) (198)/(462)

Using Venn diagrams, represent (i) (A uu B) '(ii) (A'uu B')

Find the blanks by using > or < to complete the following: (i) 0.39 ... 0.72 (ii) 0.109 ... 0.83

1+ pr I py 1+pz'Z)(zx)

What is the value of z^(2)+(bar(z))^(2)+2|z|^(2), if z=3+2i?(A)36(B)81+12i(C)39(D)40+12i

Let's do mentally - (e) I have taken 1/3 part of mango from Mala's busket of mangoes. If I there were 39 mangoes, how many I have taken?