Mary’s annual income is $15,000 and John’s annual income is $16,000. By how much must Mary’s annual income increase so that it constitutes 50% of Mary and John’s combined income?  Choose the correct choice from the following options:  A) $1,000  B) $4,000  C) $7,000  D) $11,000  E) $25,000
Let Mary's income increase by x, then the equation will be   15,000 + x= (50/100)* (15,000 + x + 16000 )   15,000 + x = (1/2) * (31,000 + x)   30,000 + 2x = x + 31,000   x =1,000   So, $1,000nswer will be $1,000
<result>A</result>
Mary’s annual income is $15,000 and John’s annual income is $16,000. By how much must Mary’s annual income increase so that it constitutes 50% of Mary and John’s combined income?