A box consists of 6 red cards, 5 yellow cards and 4 white cards. Two cards are drawn at random from the box. Find the probability that both cards are of the same colours?

8121 because

130,000 divided by 16 is 8121

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt