In a market research project 20% opted for Nirma detergent whereas 60% opted for surf Blue detergent. The remaining individual as ere not certain. If the difference between those who opted for surf blue and those who were uncertain as 720, how many respondents were covered in the surveys? `1440` b. `3600` c. `1800` d. Data inadequate

In a market research project, 20% opted for Nirma detergent where as 60% opted for 'Surf excel' detergent .The remaining individuals were not certains. If the difference between those who opted for 'Surf blue' and those who were uncertain was 720 how many respondents were covered in the survey

In an election 30% of the voters voted for candidate A whereas 60% of the remaining voted for candidate B. The remaining voters did not vote. If the difference between those who voted for candidate A and those who did not vote was 1200, how many individuals were eligible for casting vote in that election? 10 , 000 b. 45 , 000 c. 60 , 000 d. 72,000

There are seven persons A, B, C, D, E, F and G who were born on the same day of the same month of different year i.e. 1984, 1946, 1967, 1972, 1982, 1989 and 1992 but not necessarily in the same order. Note: Their age are considered as on the same month and day of 2017 as their date of births. The difference between the ages of B and C is twice the square root of the age of one of the any seven persons. Difference between the ages of C and D is the same as the number obtained by dividing ages of any of the other five persons. Age of A is greatest amongst those whose age is a multiple of five. E is older than G who is not the youngest. B is not youngest person. How many persons are younger than F ?