Question 570803
20% of 30 professional r mathematician how many mathematician it should hire so the ratio will become 10/11
:
Let m = no. of math guys required to accomplish this
That means there were .2(30) = 6 math guys to start with
{{{((m+6))/((m+30))}}} = {{{10/11}}}
Cross multiply
11(m+6) = 10(m+30)
11m + 66 = 10m + 300
11m - 10m = 300-66
m = 234 math guys needed
:
:
Check:
{{{240/264}}} = {{{10/11}}}