lalania1 wrote:

this question comes from Prep4Gmat app

A competition requires teams to attempt 10 long jumps and 5 high jumps. Each successful long jump is worth the same number of points, and each successful high jump is worth the same number of points. Team A completed all 15 jumps, receiving 20 points. Team B succeeded in only 8 long jumps and 2 high jumps, earning 10 points. Team C missed 2 long jumps and successfully completed all the high jumps. How many points did Team C score?

A) 12

B) 13

C) 15

D) 18

E) 19

This is algebra problem in word form. Let L be points for long jump and H for high jump,

so A got 10 L + 5 H = 20 => 2 L + H = 4

B got 8 L + 2 H = 10 => 4 L + H = 5

C got 8 L + 5 H = ?

So multiply A by 6 and subtract B , 6(2 L + H ) - 4 L - H = 6 * 4 - 5 = 24 - 5 =19

Answer is E