Prove : `(87xx87xx87+13xx13xx13)/(87xx87-87xx13+13xx13)` =100

Prove that :(0.87x0.87x0.87+0.13x0.13x0.13)/(0.87x0.87-0.87x0.13+0.13x0.13)=1

Simplify: (387xx387 + 113xx113 + 2xx387xx113) (87xx87 + 61xx61- 2xx87xx61)

(27xx4-13xx6)/(25-:5xx2)=

9 xx (-13)-13 =____.

7 xx 11 xx 13 xx 15 + 15 is a

Find the factors of 330. (a) 2xx4xx5xx11 (b) 2xx3xx7xx13(c)2xx3xx5xx13(d)2xx3xx5xx11

Two cards are drawn from a well shuffled deck of 52 playing cards with replacement. The probability that both cards are queen is 1/(13)xx1/(13) b. 1/(13)+1/(13) c. 1/(13)xx1/(17) d. 1/(13)xx4/5

(331+19)xx(15-11)xx(37+13)=?