Subject :IMO Class : Class 7
In a quiz, 40 prizes consisting of 1^{st} and 2^{nd} prizes only are to be given. 1^{st} and 2^{nd} prizes are worth ₹ 2500 and ₹ 1500, respectively. If the total prize money is ₹ 85,000, then
(i) the equation formed is
(ii) the number of 1^{st} prizes are
(iii) the number of 2^{nd} prizes are
-----------------(i) | (ii) | (iii) | |
A | 2500x + 1500(40 – x) = 85000 | 25 | 15 |
B | 2500x – 1500(40 – x) = 85000 | 36 | 4 |
C | 2500x × 1500(x – 40) = 85000 | 20 | 20 |
D | 2500x – 1500(x – 40) = 85000 | 15 | 25 |
explanation please