The ratio of two number is 3 : 5 and their sum is 640 . The greater of the numbers is-

240

400

480

520

300

প্রশ্ন: The ratio of two number is 3 : 5 and their sum is 640 . The greater of the numbers is-

ব্যাখ্যা:

Let, the numbers be 3x and 5x
$∴$ 3x + 5x = 640
$\Rightarrow$ 8x = 640
$\Rightarrow$ x = 80
$∴$ 5x = 400

One Bank Ltd One Bank Ltd - Special Cadre Officer - 09.11.2012 গণিত

Two numbers A and B are such that the sum of 5% of A and 4% of B is two-third of the sum of 6% of A and 8% of B. What is the ratio of A and B?

2 : 5

2 : 3

1 : 1

4 : 3

None of these

9,600

9,300

9,000

8,600

1 to 3

5 to 12

12 to 20

None of these

9,000

7,500

6,000

4,500

2/3

5/6

3/4

4/5