The mean mass of a squad of 19 hockey players is 82 kg A player of mass 93 kg joins the squad. Work out the mean mass of the squad now.

"Mean" stands for "average", so if you add the mass of all the players together, then divide by the amount of players, you get 82kg. [ (number of players) x (mean mass) = (sum of mass) ] which is ... [ 19 x 82 = 1558 ] To find the new mean, rearrange then update this formula. Since you want to find the mean mass, you want a formula that has "mean mass = ..." , so you divide both sides by the number of players to get... [ (mean mass) = (sum of mass) / (number of players) ] Add the new player's mass, 93, to the "sum of mass", add 1 to the "number of players", then plug these new numbers into the formula to get the new mean. [ (mean mass) = (1558 + 91) / (19 + 1) = 82.45kg ]

Answered by Henry H. Maths tutor

9025 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

solve x^2 >3(x+6) (4 mks)


A ladder 6.2m long is leaning against a wall. The bottom of the ladder is 0.8m from the wall. Calculate the distance the ladder reaches up the wall, giving your answer to two decimal points.


Find the roots of x^2+5x+4=0


Let n be an integer greater than 1. Prove that n^2 - 2 - (n-2)^2 is an even number.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences