A man and his wife appear in an interview for two vacancies in the same post. The probability of husband's selection is (1/7) and the probability of wife's selection is (1/5). What is the probability that only one of them is selected ?
If the letters of the word SACHIN are arranged in all possible ways and these words are written out as in dictionary, then the word ‘SACHIN’ appears at serial number
A certain sum of money is invested for one year at a certain rate of simple interest. If the rate of interest is 3% higher, then the invest earned will be 25% more than the interest earned earlier. What is the earlier rate of interest ?
I. Class A has a higher enrollment than Class B.
II. Class C has a lower enrollment than Class B.
III.Class A has a lower enrollment than Class C.
If the first two statements are true, the third statement is
The difference between compound interest and simple interest on a sum for two years at 8% per annum, where the interest is compounded annually is Rs.16. if the interest were compounded half yearly , the difference in two interests would be nearly
A sum of money lent at compound interest for 2 years at 20% per annum would fetch Rs.482 more, if the interest was payable half yearly than if it was payable annually . The sum is
Average of 11 reulsts is 60. if the average of six results is 58 and that of the last six is 63, find the sixth result
The average of 25 results is 18. the average of the first twelve of them is 14 and that of last twelve is 17. Find the thirteenth result
Of three number, second is twice the first and it also thrice the third if the average of the three number is 44, find the largest number
In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:
How many integers, greater than 999 but not greater than 4000, can be formed with the digits 0, 1, 2, 3 and 4, if repetition of digits is allowed?
In a certain language, SUPERMAN is coded as TTQDSLBM. How is SPIDERMAN coded in that language ?
In three coloured boxes - Red, Green and Blue, 108 balls are placed. There are twice as many balls in the green and red boxes combined as there are in the blue box and twice as many in the blue box as there are in the red box. How many balls are there in the green box ?
How many times in a day, are the hands of a clock in straight line but opposite in direction?
there are two seciton of A and B of a class, consisting of 36 and 44 students respectively. if the average weight of section A is 40 and that of B is 35. find the average weight of whole class?