After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the ages of the replaced and the new member? (a) 2 years   (b) 4 years   (c) 8 years   (d) 15 years

After replacing an old member by a new member, it was found that the average age of five member of a club is the same as it was 3 years ago. The difference between the ages of the replaced and the new member is - पुराने सदस्य के स्थान पर नये सदस्य के आने के बाद देखा गया कि क्लब के पाँच सदस्यों की औसत आयु उतनी ही रही जितनी 3 वर्ष पहले थी। हटाए गए सदस्य और नए सदस्य के बीच आयु का अंतर ज्ञात कीजिए?

In a club, the average age of the members is 30 years, the average age of the male members is 34 years and that of the female members is 26 years. The percentage of the male members is

The average age of 7 members of Patel's family is 25 years. The average age of the same family 3 years ago was :

Mean age of 25 members of a club was 38 years. If 5 members with mean age of 42 years have left the club, what is the present mean age of the club members?

If a 32 year old man is replaced by a new man,then the average age of 42 men increases by 1 year. What is the age of the new man?

The age of five members of a family are 42, 49, 56, 63 and 35 years.Find their average age

The average age of a group of 8 members is same as it was 3 years ago, when a young member is substituted for an old member, the incoming member is younger to the outgoing member by