19. 					DE:BC= ………
					A. 1:2    B. 1:3
					C. 2:3    C. 3:4
					E. 3:2

20.x2=………..
    A. 43    B. 45    
    C. 85    D. 93
    E. 80

21. x=………
    A. 20    B.30
    C.35    d. 40
    E. 50  
33. A and B are two sets such that n(A) = 10, n(B)= 25 and n(A∪B) =30, where n(P) is the 
    number of elements in the set P. If an element is chosen  at random from the set A∪B, the 
    Probability that will not be an element of B\A is
    A.1/8    B.1/3    C.2/3    D.5/6    E. None of these
34. A bag contains 12 white balls and some red balls. The probability of drawing a red ball is 5/11.
     The number of red balls is 
    A.10    B.12    C.22    D.5    E. None of these
35. A letter is chosen from the letters of the word “ MATHEMATICS”. The probability that it 
    will be a vowel is
    A.4/9    B.4/11    C.5/9    D.5/11    E.7/11