Question
The average weight of 14 students in a class is 30 kg.
Two more students weighing 20 kg and 24 kg join the class. What is the average weight of the class now?ÂSolution
Given: Average weight of 14 students = 30 kg So, total weight of 14 students = 14 × 30 = 420 kg Two more students join with weights: Student 1 = 20 kg & Student 2 = 24 kg Their total = 20 + 24 = 44 kg New total weight = 420 + 44 = 464 kg New number of students = 14 + 2 = 16 students New average weight = Total weight ÷ Total students = 464 ÷ 16 = 29 kg
A bag contains black and white balls, such that the probability of picking a black ball is 4/7. If the probability of picking two black balls without re...
A jar contains 6 pink, 2 black and 4 orange balls. If 3 balls are chosen at random without replacement, what is the probability that all 3 balls are of ...
A bag contains 3 black and 9 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
"A piggy bank comprises 5-rupee coins, 10-rupee coins, and 20-rupee coins. The quantity of 5-rupee coins in the piggy bank is 75% more than the number o...
- A jar contains six 50 paise coins, six Rs. 1 coins, and twelve Rs. 10 coins. One coin is lost. Find the probability that the lost coin is not a 50 paise co...
- Bag A contains 3 red, 4 black, 8 blue and 5 yellow balls. Bag B contains 5 red, 2 black, 4 blue and 3 yellow balls. Find the probability of drawing 2 blue ...
A box contains (x + 3) black balls, 6 yellow balls, and 5 orange balls. If two balls are selected at random and the probability of selecting two orange ...
Which of the following cannot be the probability of an event?
Find the probability that a number selected at random from first hundred number is a multiple of 3 or 5?Â
A game consists of tossing three coins once and then rolling two dice. Find the probability of getting exactly one tail in the coin toss and a sum equal...
