A person has only Rs.1 and Rs. 2 coins with her. If the total number of coins that she has is 50 and
A person has only Rs.1 and Rs. 2 coins with her. If the total number of coins that she has is 50 and the amount of money with her is Rs.75, then the number of Rs. 1 and Rs.2 coins are, respectively
(a) 15 and 35 (b) 35 and 15 (c) 30 and 20 (d) 25 and 25
4 views
1 Answers
(d) Let the no. of Rs.1 coins = x
and the no. of Rs.2 coins = y
According to the question:
x + y = 50 . ... (i)
x.1 + 2. y = 75 . ... (ii)
on solving (i) and (ii), we get
2y – y = 75 – 50
⇒ y = 25
put value of y in equation (i), we get
x = 50 – y
= 50 – 25 = 25
Hence, number of Rs.1 and Rs. 2 coins are 25 and 25 respectively.
4 views
Answered