CAT Exam

In a locality, there are ten houses in a row. On a particular night a thief planned to steal from three houses of the locality. In how many ways can he plan such that no two of them are next to each other?

Read Solution (Total 1)

it can be done in 8c3 ways
56 ways
12 years agoHelpfull: Yes(3) No(2)

CAT Other Question

Suppose half the people on a bus exit at each stop and no additional passengers board the bus. If on the Sixth stop the next to last person exits the bus, then how many people were on the bus? There are four machines in a factory. At exactly 8 pm, when the mechanic is about to leave the factory, he is informed that two of the four machines are not working properly. The mechanic is in a hurry, and decides that he will identify the two faulty machines before going home, and repair them next morning. It takes him twenty minutes to walk to the bus stop. The last bus leaves at 8:32 pm. If it takes six minutes to identify whether a machine is defective or not, and if he decides to check the machines at random, what is the probability that the mechanic will be able to catch the last bus?
A)0 B)1/6 C)1/4 D)1/3 E)1