Question 1

What is PrepSharp?

Accepted Answer

PrepSharp is an online JEE Main and JEE Advanced preparation platform that replicates the official TCS iON CBT exam interface used by NTA. It offers 25,000+ curated questions, full-length mock tests, chapter-wise practice and AI-powered performance analytics.

Question 2

Is PrepSharp free to use?

Accepted Answer

Yes, PrepSharp is free to start. You can sign up and access practice questions and mock tests at no cost. Premium plans are available for advanced analytics and mentor support.

Question 3

Does PrepSharp use the real JEE CBT interface?

Accepted Answer

Yes. PrepSharp's test player is built to match the TCS iON CBT interface used in the actual JEE Main and JEE Advanced exams conducted by NTA, including the same question palette, navigation and marking behaviour.

Question 4

Which exams can I prepare for on PrepSharp?

Accepted Answer

PrepSharp supports JEE Main, JEE Advanced, BITSAT, VITEEE and WBJEE preparation through chapter-wise question banks, previous year papers and full-length mock tests.

Question 5

Who builds the content on PrepSharp?

Accepted Answer

PrepSharp's curriculum, question bank and explanations are curated and verified by IIT alumni and senior JEE educators to ensure accuracy and alignment with the latest NTA syllabus.


$X$	$P (X)$	$X P (X)$	$(X_{i} - μ)^{2}$	$P_{i} X (X_{i} - μ)^{2}$
$X = 0$	$\frac{^{7} C _{2}}{^{10} C _{2}}$	0	$(0 - \frac{3}{5})^{2}$	$\frac{7}{15} (\frac{9}{25})$
$X = 1$	$\frac{^{7} C _{1} ^{3} C _{1}}{^{10} C _{2}}$	$\frac{7}{15}$	$(1 - \frac{3}{5})^{2}$	$\frac{7}{15} (\frac{4}{25})$
$x = 2$	$\frac{^{7} C _{0} ^{3} C _{2}}{^{10} C _{2}}$	$\frac{2}{15}$	$(2 - \frac{3}{5})^{2}$	$\frac{2}{15} (\frac{49}{25})$

JEE Main 2025 — Probability Question with Solution

Question

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Step-by-step explanation

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