`2 3/5-:5/7=\ ` `(13)/7` (b) `(13)/(25)` `(91)/(25)` (d) `(25)/(91)`

(13)/(25)times 1 (7)/(8)

Evaluate each of the following: (-5)/(14)(-2)/(7) (ii) (13)/(15)-(12)/(25) (iii) (-6)/(13)-(-7)/(13)

Two non-negative integers are chosen at random,then the probability that the sum of their squares is divisible 5 is (7)/(25) (b) (8)/(25) (c) (9)/(25) (d) (5)/(25)

(2/3)^(-5)x\ (5/7)^(-5) is equal to (2/3x5/7)^(-10) (b) (2/3x5/7)^(-5) (c) (2/3x5/7)^(25) (d) (2/3x5/7)^(-25)

If a:b=2:5, then (3a+2b)/(4a+b)=(16)/(13)( b) (13)/(16)(25)/(22)(d)(20)/(21)

((-2)/5)^7-:((-2)/5)^5 is equal to 4/(25) (b) (-4)/(25) (c) ((-2)/5)^(12) (d) (25)/4

Harmonic conjugate of the point (5,13) with respect to (2,-5) and (3,1) is (1,(13)/(5))(b)((13)/(5),1)((13)/(5),(7)/(5)) (d) (-(7)/(5),(13)/(5))

Rahul has a bag which contains 4 white,5 black and 6 red balls.3 balls are drawn randomly by Shobhit.Then what is the probability that the balls drawn are ot different colours? (A) (13)/(91) (B) (18)/(91)( C )(21)/(91) (D) (24)/(91)

If there are 15 cards of these 10 have the letter "I" printed 5 have the letter "T" printed. If 4 cards are picked at random one after the another and kept in the same order, the probability of making the word "IIIT" is (A) (10)/(91) (B) (15)/(91) (C) (20)/(91) (D) (25)/(91)