Question

There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is 5 8 . There are 25 red marbles in the bag and each is equally likely to be chosen. Work out how many marbles in total there must be.

Answer 1

Answer:

40

Step-by-step explanation:

P(Red) = Red/Total = 25/(25+x)

Total = Red + Blue

Let blue be x.

Total = 25+x

x = 25×8/5

= 40

Answer 2

Answer:

$\huge\sf\underline \pink{ \underline{40‎ ‎ ‎ ‎ ～}}$