`-11/6`×`5/6`+`7/9`-`11/9`×`1/6​`

If 1-1/3+1/5-1/7+1/9-1/(11)+=pi/4 , then value of 1/(1xx3)+1/(5xx7)+1/(9xx11)+ is pi//8 b. pi//6 c. pi//4 d. pi//36

Two dice are thrown simultaneously, the probability of obtaining total score of 7 is a. 1//6 b. 7//36 c. 4//9 d. 11//36

Simplify: 8/9+(-11)/6

Express each of the following as a rational number of the form p/q :\ (15)/2+9/8+(-11)/3+6+(-7)/6 (ii) (-7)/4+0+(-9)/5+(19)/(10)+(11)/(14)

Find: (8)/(9)-(11)/(6)

Arrange the following rational numbers in descending order: 4/9,\ (-5)/6,\ (-7)/(-12),(11)/(-24)

simplify : 3/(11)xx(-5)/6xx\ (-(22)/9)xx\ (-9/5)

Express each of the following as a rational number of the form p/q :\ (-8)/3+(-1)/4+(-11)/6+3/8-3 (ii) 6/7+1+(-7)/9+(19)/(21)+(-12)/7

Find (i) 7/24-17/36 (ii) 5/63-((-6)/21) (iii) (-6)/13-7/11 (iv) -2/9 -6

Simplify: (3/(11)xx5/6)-\ (9/(12)xx4/3)+\ (5/(13)xx6/(15))