Logo
    Logo

    Subject

    Quantitative Aptitude

    Topic

    Average

    10 years ago, the average age of a family of 4 members was 24 years. Two children having been born (with age diference of 2 years), the present average age of the family is the same. The present age of the youngest child is

    ক)
    -1
    খ)
    9
    গ)
    12
    ঘ)
    3

    Explanation

    Total age of 4 members, 10 years ago = (24 x 4) years = 96 years. Total age of 4 members now = [96 + (10 x 4)] years = 136 years. Total age of 6 members now = (24 x 6) years = 144 years. Sum of the ages of 2 children = (144 - 136) years = 8 years. Let the age of the younger child be x years. Then, age of the elder child = (x+2) years. So, x+(x+2) =8 <=> x=3 Age of younger child  =  3 years.

    Related questions

    If the average of 8, 11, 25, and p is 15 then 8+11+25+p = ?An EMBA student receives grades 78, 80, 82 and 84 in four subjects. If he/she wants to maintain an average of 80 how much he /she should get in the fifth subject?Sum of P and Q is 72 and the value of R is What is the average of P, Q and R?A student was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found the mean to be 12. What should be the number in place of x ?The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?If the simple average of four numbers k, 2k+3, 3k-5, and 5k +1 is 63, what is the value of k?কামাল,জামাল এবং সালাম এর দৈনিক আয় একত্রে ৯০ টাকা । যদি জামাল কামালের চেয়ে ১০ টাকা বেশি আয় করে এবং সালামের আয় জামালের আয়ের দ্বিগুন হয়,তবে কামাল ও জামালের আয়ের গড় কত ?A certain factory employed 600 men and 400 women and the average wager was Rs. 25.50 per day, If a woman got Rs. 5 less than a man, then what are their daily wages ?

    Find Tutors

    View all Tutors