Question

if 15 words are to be typed, typist a can type a word in 2 seconds and typist b can type a word in 3 seconds then the minimum time required to type 15 words is

Answer 1

If you want their individual times, typist A would take 8 seconds while typist B would take 5 seconds. If you want them to type together, the easiest way to do it would to count up by seconds, including both of their words. One second would be five words, two seconds would be 10 words, and three seconds would be 15 words.