The free JEE Advanced Maths diagnostic

22 questions, about 10 minutes. We name the exact JEE Advanced misconception losing you marks -- not “you need more practice”, the specific pattern -- and point you at the targeted lesson that fixes it.

No signup needed. Designed around JEE Advanced. Class 11 and Class 12.

JEE Advanced Maths DiagnosticQuestion 1 of 22

A diagnostic test is 99% accurate: $P(\text{positive}\mid\text{disease}) = 0.99$ and $P(\text{negative}\mid\text{no disease}) = 0.99$ . The disease affects 1 person in 1000. A randomly chosen person tests positive.

What is the probability they actually have the disease?

About 9%

99% — the test is 99% accurate

About 50%

About 1%