The average marks of the first 10 students are 17 and that of the next 15 students is 18. find the mean of 25 students?

It’s hard to understand what you put.. can you show a picture ?

Definitely

The great thing about this problem is they give you everything you need to solve it easily. so the expression is: 12h+30w12h+30wand so everywhere you have an “h” you place 66. and everywhere you have a “w” you place 33. then the expression will look like this: 12(66)+30(33)12(66)+30(33)from here you multiply and then add. getting the following of: $785,862hope this