The average weight of a group of five persons, A, B, C, D, and E is 66 kg. If another person K joins the group then the average weight of the group is decreased by 4 kg, then find the weight of K.
Total weight of A, B, C, D, and E together = 66 × 5 = 330 kg Weight of K = 62 × 6 – 330 = 372 – 330 = 42 kg
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An examinee is required to answer the eight questions out of 16 questions which are divided into two groups each containing eight questions each and he...
In how many different ways can the letter of the word WELCOME is arranged so that vowels always occur together?
