WBJEE 2015 Solved Mathematics Question Paper – Part 3

Find WBJEE 2015 Mathematics Question Paper in this article. This article contains Questions (#21 to #30) of WBJEE 2015 Mathematics Paper.

Created On: Jan 27, 2017 15:43 IST
Modified On: Feb 13, 2017 18:48 IST

Get free access to WBJEE 2015 Solved Mathematics Question Paper – Part 3 in this article. This paper consists of 10 questions (#21 to #30) from WBJEE 2015 Mathematics paper. Also, detailed solution of each question has been provided in this article.

About WBJEE Exam

WBJEE is a common entrance examination held at state level for admission to the Undergraduate Level Engineering and Medical courses in the State of West Bengal. The WBJEE engineering entrance exam has two sections – Mathematics, Physics and Chemistry. The Mathematics section of WBJEE 2015 engineering entrance exam consists of 80 questions.

Importance of Previous Years’ Paper:

Previous year question papers help aspirants in understanding exam pattern, question format, important topics and assessing preparation. It has also been seen that sometimes questions are repeated in WBJEE Exam. So, this paper will certainly boost your confidence.

wbjee 2015 mathematics

Ans: (A)

Sol.

wbjee 2015 mathematics

So, the interval where the given case is satisfied is:

wbjee 2015 mathematics

WBJEE 2016 Solved Physics and Chemistry Question Paper

22. A particle starts moving from rest from a fixed point in a fixed direction. The distance s from the fixed point at a time t is given by s = t2 + atb + 17, where a, b are real numbers. If the particle comes to rest after 5 sec at a distance of s = 25 units from the fixed point, then values of a and b are respectively

(A) 10, –33

(B) –10, –33

(C) –8, 33

(D) –10, 33

Ans : (B)

Sol.

When the particle comes to rest, then its velocity is zero.

And velocity can be found out by differentiating s

wbjee 2015 mathematics

wbjee 2015 mathematics

Ans: (C)

Sol.

wbjee 2015 mathematics

wbjee 2015 mathematics

(A) 2, 2

(B) 1, 2

(C) 2, 1

(D) 2,0

Ans : (A)

Sol.

We have,

wbjee 2015 mathematics

Again applying L Hopitals rule in (1)

wbjee 2015 mathematics

Now, according to question,

wbjee 2015 mathematics

WBJEE Sample Question Paper Set-II

25. Let P(x) be a polynomial, which when divided by x – 3 and x – 5 leaves remainders 10 and 6 respectively. If the polynomial is divided by (x –3) (x–5) then the remainder is

(A) –2x + 16

(B) 16

(C) 2x – 16

(D) 60

Ans: (A)

Sol.  

Let the remainder be ax + b

According to question,

P(x) = (x – 3)(x – 5) q(x) + (ax + b)

We have,

p(3) = 10

And p(5) = 6

wbjee 2015 mathematics

wbjee 2015 mathematics

Ans: (B)

Sol.

Let us assume that,

wbjee 2015 mathematics

wbjee 2015 mathematics

Ans: (A)

Sol.

wbjee 2015 mathematics

wbjee 2015 mathematics

28. In a certain town, 60% of the families own a car, 30% own a house and 20% own both a car and a house. If a family is randomly chosen, what is the probability that this family owns a car or a house but not both?

(A) 0.5

(B) 0.7

(C) 0.1

(D) 0.9

Ans : (A)

Sol.

The data in the question can be represented through Venn Diagram as;

wbjee 2015 mathematics

From the above Venn diagram the percentage of the family owns a car or a house but not both is

(40 + 10)% = 50 %

So, the required probability is 0.5

29. The letters of the word COCHIN are permuted and all the permutations are arranged in alphabetical order as in English dictionary. The number of words that appear before the word COCHIN is

(A) 360

(B) 192

(C) 96

(D) 48

Ans: (C)

Sol.

In dictionary the words starting from CC, CH, CI and CN  will appear first

Now, fixing CC the remaining 4 letters O, H, I and N can be arranged in 4! ways.

Similarly the words starting from CH, CI and CN will also be arranged in 4! ways.

So, number of words that appear before the word COCHIN is (4!)4 = 96

wbjee 2015 mathematics

(A) 0 (zero)

(B) 2

(C) 5

(D) 3

Ans : (A)

Sol.

wbjee 2015 mathematics

WBJEE 2016 Solved Mathematics Question Paper

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