MathsKing

Definition: probability is the number of favorable outcomes out of the number of possible outcomes. Q-1) What is the probability of head side in the cricket toss ? Solution: Total side = (1 Head + 1 Tail) = 2 So, probability of head is = No. of Heads / Total Side = 1/2 = 0.5 = 50%  P(even) = 50% Q-2) What is the probability of tail side in the cricket toss ? Solution: Total side =   (1 Head and 1 Tail) =  2    So, probability of Tail is = No. of Tails / Total Side = 1/2 = 0.5 = 50%  P(tail) = 50% Q-3) What is the probability of even number  when you roll the die ? Solution: Total number in a die =  1,2,3,4,5,6 = 6 numbers Total even numbers  = 2,4,6 = 3 numbers = 3/6 = 1/2 = 0.5 =50% P(evenNumber) = 50% Q-4) What is the probability of odd number when you roll the die ? Solution: Total number in a die =  1,2,3,4,5,6 = 6 numbers Total even numbers  = 1,3,4 = 3 numbers = 3/6 = 1/2 = 0.5 =50...

Q-1) What is percentage value of 7/20? Solution: 7/20 = (7/20 × 100)% = 35% Q-2) Convert percentage in fraction (1) 16 % = 16/100 = 4*4/25*4 = 4/25 (2) 48 % = 48/100 = 12*4/25*4 = 12/25 (3) 5 % = 5/100 = 5/20*5 = 1/20 (4) 25 % = 25/100 = 25/25*4 = 1/4 (5) 115 % = 115/100 = 23*5/20*5 = 23/20 (6) 1 % = 1/100 Q-3)Find 30 % of 90 Solution: 30 % of 90 = 30/100 × 90 = (30 × 90)/100 = 2700/100 = 27 Q-4) In a class of 70 students, 30% are girls. Find total girls and total boys in the class? Solution: Total girls in the class:  = 30 % of 70 = 30/100 × 70 = 2100/100  = 21 Total boys in the class:  = Total students in class - Number of girls = 70 – 21 = 49 Q-5) Raj scored 444 marks out of 500 marks and his elder brother Dharm scored 580 marks out of 600 marks. Who scored better percentage? Solution: Percentage of marks scored by Raj  = (444/500 × 100) % = (44400/500) % = (444/5) % = 88.8 % Percentage of marks scored by Dharm  ...