1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A test has 20 questions worth 100 points. The test consists of yes/no questions worth 3 points each and multiple choice questions worth 11 points each. How many yes/no questions are on the test?

A
15
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
12
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
C
14
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
D
13
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
Open in App
Solution

The correct option is B 15Let us assume x = Yes / No questions Let y = Multiple Choice questionsThen as per the given statement form equations,x+y=20 ----- (1)3x+11y=100 ----- (2)Multiply the equation (1) by 11 and then subtract the equations (3) and (4), we get11x+11y=220 -----(3)3x+11y=100 -----(4)______________8x=120x=1208=15Therefore, there are 15 yes/no questions.

Suggest Corrections
2
Join BYJU'S Learning Program
Related Videos
Solving Complex Equations
MATHEMATICS
Watch in App
Join BYJU'S Learning Program