Question
A card is drawn randomly from a deck of ordinary playing
cards. You win Rs.900 if the card is a spade or a king. What is the probability that you will win the game?Solution
Let S = the event that the card is a spade; and let A = the event that the card is a King. We know the following: There are 52 cards in the deck. There are 13 spades, so P(S) = 13/52. There are 4 King, so P(A) = 4/52. There is 1 King that is also a spade, so P(S ∩ A) = 1/52. Therefore, based on the rule of addition: P(S ∪ A) = P(S) + P(A) - P(S ∩ A) P(S ∪ A) = 13/52 + 4/52 - 1/52 = 16/52 = 4/13.
- What will come in the place of question mark (?) in the given expression?
35% of 400 - 20% of 300 = (? - 30) X 2 128 ÷ 22 × ? = 15% of 300 ÷ 9
What will come in the place of question mark (?) in the given expression?
48 X 2.5 + 20% of 150 = ? + 166
What will come in the place of question mark (?) in the given expression?
21 × 18 + ? – 19 × 15 = 25 × 24
30% of 8/5 × 5/7 × 2870 =?
7.4 × 8.2 + 3.5 × 4.5 = ? + 11.5 × 2.5
Solve the following:
1500 ÷ (9 × 18 ÷ 6 × 3 – 45) ²
What will come in the place of question mark (?) in the given expression?
? = (266 × 276) ÷ (114 × 161) × 17
52% of 36% of 810 = 72% of 18% of ?Â
1/5 of 6/3 of 3/2 of 1966 = ?
