He ratio of the number of marbles in the red bag to the number in the blue bag is 3 : 5. Two marbles are moved from the blue bag to the red bag, making the ratio 7 : 9.

How many marbles are there in total?

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236