Last year the range of the annual yield on equal amount of investments in 100 mutual funds was $10,000. If the annual yield this year for each of the 100 mutual funds has improved by 15 percent this year than it was last year, what is the range of the annual yield on mutual funds this year?	Options:
A) $12700 B) $13000 C) $23000 D) $11500 E) $33000
let the lowest yield be x.   Therefore, highest yield is x +10000.   Now yield of each mutual fund investment is improved by 10%.   Therefore the yields will remain arranged in the same order as before.   or Lowest yield = 1.15x and Highest = 1.15 * (x+10000)   or Range = highest - lowest = 1.15* (x+10000) - 1.15x   = 11500, Hence, $11500
<result>D</result>
Last year the range of the annual yield on equal amount of investments in 100 mutual funds was $10,000. If the annual yield this year for each of the 100 mutual funds has improved by 15 percent this year than it was last year, what is the range of the annual yield on mutual funds this year?