(20+8times0.5)/(20-?)=12

(20+8xx0.5)/(20-?)=12. Find the value in place of (?)( a) 2 (b) 8 (c) 18 (d) None of these

Evaluate: (-5) times (-20) times (-12) times (-1)

(-8)times9+(-8)times7],[" (iii) "20times(-16)+20times14 , (-11)times(-15)+(-11)times(-25)

Prove that: 15sin(5pi)/(12)+15cos(5pi)/(12)-20sin^3(5pi)/(12)-20cos(5pi)/(12)=0

(-36/5)xx(20/-3)

Evaluate : (i) 2 xx 6! - 3 xx 5! (ii) (8!)/(4!) (iii) (20!)/(18!(20 - 18)!)

Simplify: 10(1)/(8) of (12)/(15)-:(35)/(36) of (20)/(49)*( a) 17(5)/(12) (b) 17(8)/(17) (c) 20(3)/(25) (d) 20(103)/(250)

let 2..^(20)C_(0)+5.^(20)C_(1)+8.^(20)C_(2)+?.+62.^(20)C_(20) . Then sum of this series is