EXERCISE 13.2 Q NO. 8 AND 9

Two dice are thrown together. The probability that neither they show equal digits nor the sum of their digits is 9 will be a. 13/1 b. 13/18 c. 1/9 d. 8/9

Find the median of : 25, 18, 13, 20, 16, 9, 22, 8, 6, 15, 21, 11, 17

If x^(2)-8x+13 = 0, x =

For solving each pair of equations, in this exercise, use the method of elimination by equating coefficients : 13 + 2y = 9x 3y = 7x

Find the Q_(1)andQ_(3) for the following distribution : 5, 3, 6, 3, 13, 9, 8, 24, 19, 20, 18.

The marks scored by 10 students in a monthly test are: 9, 13, 17, 6, 8, 13, 11, 10, 5, 9 The median marks are

If 8^(13) = 2^(z) , then z =

Given that P (3, 2, 4) , Q (5, 4, 6) and R (9, 8, 10) are collinear. Find the ratio in which Q divides PR.

Two circles, each having radius 4, have a common tangent given by 3x+2y-6=0 at (2, 0) . Then their centres are : (A) (2+ 5/sqrt(13), 8/sqrt(13)), (2- 5/sqrt(13) , (-8)/sqrt(13)) (B) (2+ 12/sqrt(13), 8/sqrt(13)) , (2- 12/sqrt(13), (-8)/sqrt(13)) (C) (2, 3), (4, 5) (D) none of these

Which ratio is larger in the following pairs? (i) 3:4 or 9:16 (ii) 15:16 or 24: 25 (iii) 4:7 or 5:8 (iv) 9:20 or 8:13 (v) 1:2 or 13:27