Mathematics - Statistics
Practise 4 WBJEE previous year questions on Statistics, compiled from papers spanning 2015 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty WBJEE tests.
Statistics has been asked in 4 of the 18 years of WBJEE papers analysed (2009–2026), with 4 questions in all. 75% of them were easy, 25% moderate and 0% tough. Most of its questions came from 2019, with 1 question that year. In the last three years (2024–2026) it had 0 questions across 3 papers, about 0 per paper.
All of the chapter's questions come from a single topic, Statistics.
- 1If is a random variable such that then is equal to2019Statistics
- 2Mean of observations is . If an observation , is replaced by then the new mean is2017Statistics
- 3Standard deviation of observations is Then, the standard deviation of the observations is2016Statistics
- 4The variance of first 20 natural numbers is2015Statistics
Frequently Asked Questions
1.How many questions are available for Statistics?
This chapter includes 4 questions compiled from WBJEE papers spanning 2015 to 2019.
2.Are these questions only from WBJEE, or from other exams too?
These are WBJEE questions specifically for the Statistics chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Statistics an important chapter for WBJEE Mathematics?
Statistics has appeared in 4 of the 18 years of WBJEE papers covered here, with 4 questions across 4 papers - about one per paper it appears in.
4.What is the difficulty level of Statistics questions in WBJEE?
Of the 4 questions analysed for this chapter, 75% are easy, 25% moderate and 0% tough. 2019 had the most, with 1 question.
5.Which topics in Statistics should I focus on?
All of this chapter's questions come from a single topic: Statistics.
6.Is Statistics's weightage in WBJEE going up or down?
Across all 4 papers analysed, Statistics has averaged about 1.0 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.