Question
A bag contains 4 red balls, 5 blue balls, and 3 green
balls. Two balls are drawn randomly. What is the probability that both are blue?Solution
Total balls = 4 + 5 + 3 = 12. Total ways to choose 2 balls = 12C2 = 66. Ways to choose 2 blue balls = 5C2 = 10. Probability = 10 / 66 = 5 / 33. Correct Option: d
41 28 ? 15 67 2
3 15 35 63 99 ?
4                14                  130                     512                �...
1 1 8 4 27 9 81
...Select the number from among the given options that can replace the question mark (?) in the following series.
24, 35, 51, 73, 102, ?
4 5 12 39 160 ?
...10, 22, 46, ?, 130, 190
3  16  22  ?   98   206
542Â Â Â Â Â Â 541Â Â Â Â Â Â Â 532Â Â Â Â Â Â Â 507 Â Â Â Â Â Â Â 458Â Â Â Â Â Â Â ?
...If   314     306      x      269       394    178    1480
Then, 1/3 x + 2x - x = ?
...
Relevant for Exams:
