In a class test containing 30 questions 2 marks are awarded for every correct answer. And (-2) mark for every incorrect answer. Seema attemps all the questions and 12 of her answers are correct what is her total score?

Step-by-step explanation:

If the test has 30 questions each worth 2 points, then the test is worth 60 points. [30 × 2]

Seema got 12 answers correct. If each is worth 2 points, then her 12 correct answers are worth 24 points. [12×2]

Her total score is 24/60.

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,