Question
From the top of a tower, the angle of depression of the
top of a 10 m high building is 60°. If the distance between the tower and the building is 50√3 m, find the height of the tower.Solution
1 = 50√  3 √  3 = 50 √  3× √  3 = 150 total height = 150+10= 160m
In a lottery, there are 6 prizes and 30 blanks. A lottery is drawn at random. What is the probability of getting a prize?
Three cards are drawn randomly from a pack of 52 cards. What is the probability that one will be black and two will be red?
A game consists of tossing three coins once and then rolling two dice. Find the probability of getting exactly two heads in the coin toss and a sum equa...
Mohit is a teacher and he teach some students in two (Morning & evening) slots. There are 5 boys and ‘x’ girls in morning slot, while there are ‘x...
Which of the following cannot be the probability of an event?
A bag contains 5 red balls, 4 black balls and 8 white balls. Two balls are drawn simultaneously. Find the probability that both the balls are of same c...
- If 4 cards fall out while shuffling a deck of 52 cards, what is the probability that all of them are aces?
1. 1/ 52 C 4
2. 4/ 52... Given that E and F are events such that P(E) = 0.8, P(F) = 0.4 and P(E∩ F) = 0.2. Find P(F|E).
If the letters of the word PLAYERS be arranged at random, what is the probability that there are exactly five letters between P and S? Â
If the letters of the word HORIZON be arranged at random, what is the probability that all the vowels are together?
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