A bag contains yellow marbles and blue marbles, 20 in total. The number of yellow marbles is 1 less than 2 times the number of blue marbles. How many yellow marbles are there?

There are, 13 yellow marbles and 7 blue marbles

Step-by-step explanation: 7 x 7 = 14 - 1 = 13 = 7  = 20 you're welcome

62.5 paisa

step-by-step explanation:

4000*70 = 280000

280000-(2000*90) = 100000

4000-2400 = 1600

100000/1600 = 62.5

( give brainliest)

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.