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CBSE CLASS X

Mathematics

71. The algebraic sum of the deviations of a frequency distribution from its mean is

    (a) always positive

    (b) always negative

    (c) O

    (d) a non-zero numbe

72. If the product of two zeros of the polynomial

73. If then the value of

( a) 3

( b ) 1/ 2

( c ) 1 / 3

( d ) none of thèse

74. is exactly divisible by (x² - 1) Then the value of ‘a’ and ‘b’ are
    

    (a) a = -1, b = -2

    (b) a = 1, b = 2

    (c) a = -1, b = 2

    (d) a = 1, b = -2

75. The mean of the median of 2, 8, 3, 7, 4, 6, 7 and the mode of 2, 9, 3, 4, 9, 6, 9, is
    

    (a) 9

    (b) 8

    (c) 6

    (d) 7.5

76. Given that two of the zeroes of the cubic polynomial are ‘0’ the third zero is
    

    (a) − b / a

(b) b / a

(c) c / a

(d) − d / a

77. π is
    

    (a) rational

    (b) irrational

    (c) imaginary

    (d) an integer

78. There exist Infinite ……….. numbers between .
    

    (a) rational

    (b) irrational

    (c) real

    (d) All of a,b,c

79. If α, β are the zeros of the polynomial

(a) 1 (b) 2 (c)

80. If the arithmetic mean of 5, 7, 9 x is 9 then the value of x is
    

(a) 11

(b) 15

(c) 18

(d) 16

Submitted By Mr. Agyat Gupta
E-mail :- [email protected]