Question
Average speed of βAβ during a 20-hour journey is 30
km/h. If he covered the first 240 km of his journey at a speed of 20 km/h, then find the speed at which βAβ travelled during the remaining journey.Solution
Total distance covered by βAβ = 20 Γ 30 = 600 km Time taken to cover 240 km = 240/20 = 12 hours Time taken to cover remaining distance = 20 β 12 = 8 hours So, required speed = {(600 β 240)/8} = 45 km/h
- If 5 coins are tossed at a time what's the probability of getting exactly one head?
A game consists of tossing three coins once and then rolling two dice. Find the probability of getting no heads in the coin toss and a sum equal to 4 on...
A box contains 6 red, 4 blue, 2 green and 4 yellow pens. Two pens are picked at random, what is the probability that one is blue and one is yellow?
A box contains only three colors of balls- red, green and blue. What is the minimum number of balls that should be picked from the box to ensure that at...
A university has to select an examiner from a list of 50 persons. Out of these 50 persons, 20 are women and 30 are men. 10 persons know hindi and 40 do ...
Mohit is a teacher and he teach some students in two (Morning & evening) slots. There are 5 boys and βxβ girls in morning slot, while there are βx...
Β A bag contains 4 white balls, 5pink balls and 3 black balls. 2 balls are drawn randomly. What is the probability that there are no black balls?
A box contains 10 red balls, 12 green balls, and 8 blue balls. Two balls are drawn at random. What is the probability that both balls drawn are either r...
- A bag holds 20 balls, each labeled with a unique number that follows a sequence of consecutive multiples of 5, beginning with 5. What is the probability of...
There are (m + 4) red roses, (m + 9) white roses and ‘m’ pink roses in a bag. If the probability of picking a pink rose is 3/10, then find t...