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The logic followed here is: 2nd number is three times the product of the 1st and 2nd digit of the 1st number. 55 : 75 → 3 x (5 x 5) = 3 x 25 = 75. 32 : 18 → 3 x (3 x 2) = 3 x 6 = 18. 74 : ? → 3 x (7 x 4) = 3 x 28 = 84.
In how many ways Barcelona’s football team captain and vice-captain be elected from a team of 15 men?
How many different words can be made using all the letters of the word METROLOGY?
In how many different ways can the letter of the word WELCOME is arranged so that vowels always occur together?
Find the no. of words formed by using all the letter of the word DISCOUNT, so that the vowels are never together?
In how many different ways can the letter of the word ‘PRAISE’ be arranged?
How many four digit numbers greater than 5000 can be formed with the digits 4 ,5, 7, 8, and 9?
Find the quantity of methods of picking 4 cards from a set of 52 playing cards if four cards are of the same unit?
In how ways can the selection be made so that a particular member is always excluded?
A Consignment of 12 mobile phones contains 4 defectives. The mobile phones are selected at random one by one and examined. The ones examined are not pu...
In a bag there are 4 red balls, 3 green balls, and 5 blue balls. If one ball is drawn at random from the bag, what is the probability of drawing a green...
