Question 945274
Richard makes 1chair/1hour=1 chair/hr
Karen makes 1 chair/2hrs=1/2 chair/hr
Harold makes 1 chair/3hrs=1/3 chair/hr
Together they make (1+1/2+1/3) chairs/hr Find common denominator
1(6/6)+1/2(3/3)+1/3(2/2)=6/6+3/6+2/6=11/6 chairs/hr=1.83 chairs/hr
99 chairs/1.83 chairs/hour=54 hours
ANSWER C It takes the three together 54 hours to make 99 chairs.