1. S = { (H, H, H) (H, T, H) (H, H, T), (T, H, H)

       (T, T, T) (T, H, T) (T, T, H) (H, T, T) }.

       S = sample space when a coin is tossed 3 times.

       The chances of getting 3 tails = 1

       The chances of getting two heads = 3

       1 < 3

   Ans : B

2.          x²- 21x + 98 = 0

   x² - 14x - 7x + 98 = 0

           (x-14) ( x-7) = 6

             x = 14 or x = 7

       Since x takes two values, the relationship cannot be
       determined.

   Ans : D

3.      

   

   Ans : A

4. Consider m = - 2, n = - 1 (m < n < 0)

       L. H. S.        = m³ - n R.H.S. = n³ - m

       = - 8 + 1           = -1 + 2

       = - 7                 = 1

       \ R.H.S. > L.H.S

   Ans : B

5. The greatest possible value of 9 - x² will be 9 only
   if x² = 0

   \ If x = 0

   9 - x² = 9
   
   9 > 0
   
   RHS > LHS
   

   Ans : B

6. Let the price of a watch be 'a' dollars.

   Discounted price = Original price  =
   (% discount) . (original price)
   
   25% = a - .25a
   
   = .75a
   

   Net price after successive discounts of 15% and 10%

   

   Ans : B

7. 6 > 5 sides, which is the number of sides in a polygon.

   Ans : A

8. a + b + c = 180

       a + 3a + 5a = 180

   a = 20

   b = 60

   60 > 50

   Ans : A

Index

Test 3

Test 4