Dell Company Numerical Ability Probability

There are 3 sections with 5 questions each. If three questions are selected from each section, the chance of getting different questions is________

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Dell Other Question

There are 11 lines in plane. How many intersections (Maximum) can be made? Q. The ratio of present ages of X and Y is 4:5. Which of the following cant be the ratio of ages of X and Y, 20 years ago?

Option
a) 2:4
b) 9:10
c) 2:3
d) 3:5