Question
If 2 pens are drawn at random what is the probability
that one is black and one is red ? A basket contains 3 blue, 5black and 3 red pens.Solution
Let S be the sample space. Then, N(S) = number of ways of drawing 2 pens out of 11 = ¹¹C₂ = (11 ×10 )/(2 ×1) = 55 Let E = event of getting the one black and one red pen out of 8 pen. n(E) = ⁵C₁ × ³C₁ = 5 × 3 = 15 n(P) = (n(E))/(n(S)) = 15/55 = 3/11
More Data Interpretation Mains Questions
(60 × 8 ÷ 10) × 5 = ?
2850 ÷ 2.5 - ? × 42 = 300
1300% of 2341 + 1200% of 6321 = ?
√324 + √484 + 63 = ?2
8 × (25 % of 720) – 50 % of 135 % of 840 = ?
- What will come in place of the question mark (?) in the following questions?
25% of 360+40=? 5.45% of 1854 – 37.5% of 1096 = ? – 48% of 630
Find the simplified value of the following expression:
72 + 132 X 4 - {232 + 172 - 402
- What will come in place of the question mark (?) in the following questions?
(2⁴ + 6²) ÷ 2 = ? 84% of 800 + 70% of 640 = 14 × ?
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