Acoin operated machine sells plastic rings . it contains 6 yellow rings,11 blue rings,15 green rings, and 3 black rings. sarah puts a coin into the machine. find the theoretical probabilty the sarah gets a black ring, rounded to the nearest thousandth.

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.