Multiple choice

Mr. Mirinda saves 40 percent of his salary every month. But in April his expenses increased by 10 percent and he saved $1200 less than the amount he saves normally. What is his salary?

  1. $12000
  2. $15000
  3. $20000
  4. $30000
  5. $15500
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let salary be S. Normal savings = 0.4S. Expenses = 0.6S. New expenses = 0.6S * 1.1 = 0.66S. New savings = S - 0.66S = 0.34S. Given 0.4S - 0.34S = 1200, so 0.06S = 1200, which means S = 20000.

AI explanation

Let the total salary be x, where the normal savings are 0.4x and the normal expenses are 0.6x. In April, his expenses increased by 10%, becoming 0.6x multiplied by 1.1, resulting in 0.66x. His new savings became x - 0.66x = 0.34x, which is $1200 less than his normal savings, leading to the equation 0.4x - 0.34x = 1200. Solving 0.06x = 1200 results in a salary of x = 20000.

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