self Maths Puzzle

If the ratio of (2a-b):(2b-c):(2c-a) is 2:7:6,What is the value of 2a+b-c?

Read Solution (Total 1)

answer 9x , x=1,2,...

2a-b =2x
2b-c =7x and 2c-a =6x

adding 2a-b =2x and 2b- c =7x we get 2a+b-c =9x

if x=1 then value of 2a + b -c =9
if x=2 then " " =18
12 years agoHelpfull: Yes(5) No(1)

self Other Question

the rank of the word 'physics' is 8 eager students are in line to take their seats in the first row, which has exactly 8 chairs. The student decides that the first person could pick any chair to sit on. For the rest, they have to pick a seat that is immediately next to another seated student. How many ways are there for the students to seat themselves according to this method?