IPMAT 2019 - Quantitative Aptitude Question 45
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IPMAT 2019 - Quantitative Aptitude
If the sum of three numbers is 15 then the numbers could be;
6 6 3 = 3 permutations
6 5 4 = 6 permutations
5 5 5 = 1 permutations
∴ Sample space = 10
If 4 is placed at 1st place, then there are 2 arrangements possible; 4, 5, 6 or 4, 6, 5
∴ Favourable events = 2
∴ Probability = 2/10 = 1/5