Question
There are 4 red balls, 5 blue balls and 3 green balls in
a jar. 2 balls are drawn at random. Find the probability that both balls are either green or red.Solution
Given 4 red, 5 blue,3 green balls Total possible outcomes (selecting 2 out of 12 balls) = 12C2 = (12 × 11)/(2 × 1) = 66 ​Favorable outcomes (selecting 2 out of 4 red balls) = 4C2 = (4 × 3 × 2)/ (2 × 2 × 1) = 6 Favorable outcomes (selecting 2 out of 3 red balls) = 3C2 = (3 × 2)/ (2 × 1) = 3 => P(E) = (6 + 3)/66 = 9/66 = 3/22
Ten people are sitting in two parallel rows 1 and 2. A, B, C, D and E are sitting in row 1 facing the North and V, W, X, Y and Z are sitting in row 2 fa...
i) Who is sitting in the second place on the left side of the Dani, Chintu is sitting at the fourth place on the right side.
ii) There are three ...
Which among the following factors contributes to Earthquake?
1. Location
2. Distance from the epicenter
3. Local geological conditi...
If MOBILE = LMYEGY, then SONG will be equal to:
Select the word-pair that best represents a similar relationship to the one expressed in the pairs of words given below.
(The words must be consi...
Vani starts from point A and drives 6 km towards the east. He then takes a right turn and drives 10 km. He takes a final left turn and drives 8 km and s...
Seven people, A, B, C, D, E, F and G are sitting in a straight line, facing north. Only three people sit to the left of D. Only two people sit between D...
Select the option in which the words share the same relationship as that shared by the given pair of words.
Kingfisher : Bird
In a certain code language, 'PRIZE' in coded as '59764' and 'CAKE' is coded as '1423'. How is 'E' coded in the given language?
Statement:  W < T = X ≤ J > S = U > B
Conclusion:
I. T < U
II. S > X
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