Question
A box contains four Rs. 2 coins, eight Rs. 1 coins, and
sixteen Rs. 5 coins. One coin is lost. Find the probability that the lost coin is not a Rs. 2 coin.Solution
Number of Rs. 2 coins = 4
Total number of coins = 4 + 8 + 16 = 28
So, the required probability = 1 - 4/28 = 24/28 = 6/7
Calculate 50% of the L.C.M of 208 and 216.
Find the GCD of 1.08, 0.36 and 0.9.
Train X running at a speed of 32 km/hr crosses train Y in 20 seconds. Find the speed of train Y (in km/hr), if the sum of the length of train X and Y is...
Three bells ring at regular intervals of 28 seconds, 60 seconds, and 84 seconds, respectively. Over a span of 10 minutes, how many times will all three ...
The LCM of two numbers is 4 times of their HCF. The sum of LCM and HCF is 320. If one of the number is 256, then the other number is:
- The sum of HCF and LCM of two numbers is 425. If the LCM is 16 times the HCF, and one number is 25, find the second.
If total number of factors of 3,240 is 'x', then find the value of (x - 3)(x + 5).
LCM and HCF of two numbers are respectively 3 and 18. If one of them is 9, find the other number.
Relevant for Exams:
