घटाइए :
`{:((a),35-(20),(b),72-(90)),(( c) , (-15)-(-18),(d),(-20)-(-13)),((e ) ,23-(-12),( f) ,(-32)-(-40)):}`

Find (a) 35-(20) (b) 72-(90) (c) (-15) -(-18) (d) (-20) -(13) (e) 23-(-12) (f) (-32)-(-40)

Find (a) 35-(20) (b) 72-(90) (c) (-15) -(-18) (d) (-20) -(13) (e) 23-(-12) (f) (-32)-(-40)

Find the difference of the following : {:(a.,23 - (7),b.,54 - (32),c.,83 - (-71)),(d.,43 - (-89),e.,39 - (-72),f.,(-89) - (-12)),(g.,(-81) - (50),h.,(-32) - (-13),,):}

Evaluate the following : {:(a.,|20 - 9|,b.,|16-7|),(c.,|3-(9-1)|,d.,|15-(20 - 11)|),(e.,|21 - (39 - 11)|,f.,|28 - (32 - 15)|):}

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)

Evaluate : {:(a.,|40|,b.,|-41|,c.,|36-45|),(d.,|45 - (-20)|,e.,|54 - (3 - 9)|,f.,|(9 - 14) - (-12)|):}

The value of (1-(1)/(3^(2)))(1-(1)/(4^(2)))(1-(1)/(5^(2)))ddot M(1-(1)/(11^(2)))(1-(1)/(12^(2))) is (11)/(20) (b) (13)/(15) (c) (13)/(18) (d) (15)/(16) (e) None of these

Find the sum: (1)/(2)+(1)/(6)+(1)/(12)+(1)/(20)+(1)/(30)+(1)/(42)+(1)/(56)+(1)/(72)+(1)/(90)+(1)/(110)+(1)/(132)(7)/(8)( b) (11)/(12)(c)(15)/(16) (d) (17)/(18)

Calculate standard deviation for the following data : [{: ( Class Interval (C.I.) , Frequency (f) ) , (10-15,32), (15-20,28),(20-25,20),(25-30,16),(30-35,34),(35-40,10),(40-45,8):}]

If f'(4) = 5, g'(4) = 12, f(4) g(4) = 2 and g(4) = 6, then ((f)/(g)) (4) is a) (5)/(36) b) (11)/(18) c) (23)/(36) d) (13)/(18)