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.
P gave 70% of the amount he had to Q. Q gave 2/5th of that amount to R. After paying Rs.260 to the shopkeeper out of the amount he gets from ...
In a company-wide survey, it was discovered that 20% of the employees own a car. Among the remaining employees, 30% have either an Activa or a bike. The...
In a company with a total of 450 employees, 270 are men, and the remaining are women. It is known that 60% of the women are employed in the marketing de...
The salary of a man decreased from Rs. 20000 per month to Rs. 15000 per month. . Find the decrease percent.
A man spent 20% of his income in May. If his savings is increased by 20% in June and becomes Rs. 11520, then find the income of man in May.
In a zoo, 25% of the people are males. 40% of the remaining are females and the remaining 720 are children’s. Find the total number of people in a...
The weight of two persons Vishwas and Vivek are in the ratio 5:7. If the weights are increased in such a way that Vivek’s weight is increased by 2...
The income of Tina is Rs.35000 and she saves 30% of her income. The savings of Kajal is Rs.2500 more than that of Tina and she spends 60% of her income....
Out of 520 students in school, 30% students like samosa only and 40% students like samosa and momos both. If 20% students don’t like any snacks then f...
