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Let number of blue balls in the bag be ‘x’.According to question;xC2/16C2 = 3/8Or, x(x – 1) = 90Or, x2 – x – 90 = 0Or, x2 – 10x + 9x – 90 = 0Or, x(x – 10) + 9(x – 10) = 0Or, (x – 10)(x + 9) = 0Or, x = 10 or x = -9 (not possible)So, number of blue balls in the bag = 10
7, 27, 10, 32, 17, 37
42, 61, 78, 93, 102, 109
1600, 1604, 1544, 1760, 1248, 2248, 520
275, 50, 165, 33, 99, 19.8, 59.4
Find the Wrong number in the given number series.
29, 76, 123, 166, 209, 256
Find the wrong term in the given series below.
159, 160, 81, 244, 62, 318
Find the wrong number in the given number series.
5, 10, 20, 40, 85, 160
124, 186, 375, 930, 2790, 9765