Aishwarya’s mom was 36 years of age at the time of her birth, while her mom was 30 years old when her 4 years younger sister was born. The variance between the parents ages is :	Pick one:
A) 6 years B) 11 years C) 10 years D) 9 years E) 4 years
C   10 years   Mom’s age when Aishwarya’s sister was born = 30 years.   Dad’s age when Aishwarya’s sister was born = (36 + 4)= 
<gadget id="calculator">(36 + 4)</gadget>
<output>40</output>
40 years.   Needed Variance= (40 – 30) years = 10 years.   Answer is 10 years
<result>C</result>
Aishwarya’s mom was 36 years of age at the time of her birth, while her mom was 30 years old when her 4 years younger sister was born. The variance between the parents ages is :