In what ratio must tea at Tk. 62 per kg be mixed with tea at Tk. 72 per kg so that the mixture must be worth Tk. 64.50 per kg?
A
3 : 1
B
3 : 2
C
4.3
D
35
Correct Answer: 3 : 1
Hints: এটি ans দেখে মিলাতে হবে। 3:1 নিলে মিলে যায় 62 × 3 + 72 × 1/3 + 1 = 64.5