6.Find the sum. (a) `3/8+5/2`

Find the sum: 5/(8)+8/ ( 28)

Find the sum 3 C_1 + 5C_2

Find the sum:  (i) 5/8+3/(10) (ii) 4 3/4+9 2/5

Find the sum: 4(3)/(5)+2(7)/(8)

Find the sum 3(1)/(5)+4(3)/(5)+7(2)/(5)

Find the sum : (i) 5/4 + ((-11)/(4)) , (ii) 5/3 + 3/5 , (iii) (-9)/(10) + 22/15 (iv) (-3)/(-11) + 5/9 , (v) (-8)/(19) + ((-2))/(57) , (vi) (-2)/(3) + 0 (vii) -2'1/3 + 4'3/5

Find the sum:  (i) 5/6+3+3/4 (ii) 2 3/5+4 7/(10)+2 4/(15)

Find the product: (i) 3/4 xx 5/7 , (ii) 5/8 xx (-3/7) , (iii) (-2/5) xx 8

Re- arrange suitably and find the sum: 5/3+(11)/2+\ (-9)/4+\ (-8)/3+\ (-7)/2

The mean of 5 observations is 8 , Find the sum of the 5 observations.