Mathematics Test 170

Result

Mathematics Test 170

Score
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out of -
Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

The line 3x + 2y + 1 = 0 meets the hyperbola in the points P and QThe coordinates of the point of intersection of the tangents at P and Q are

A

B

C

D

Solution
Question 2
4 / -1

A

B

C

D

Solution
Question 3
4 / -1

If p is any statement, t is tautology and c is a contradiction, then which of the following is not correct?

A
p ˅ (~ p) = c

B
p ˅ t = t

C
p ˄ t = p

D
p ˄ c = c
Question 4
4 / -1

The mean and SD of 63 children on an arithmetic test are respectively 27.6 and 7.1. To them are added a new group of 26 who had less training and whose mean is 19.2 and SD 6.2. The values of the combined group differ from the original as to (i) the mean and (ii) the SD is

A
25.1, 7.8

B
2.3, 0.8

C
1.5, 0.9

D
None of these

Solution
Question 5
4 / -1

If A and B are two events such that P (A) =1/2 and P(B) = 2/3 then which of the following is not correct?

A
P(A ⋃ B) 2/3

B
P(A ⋂ B’) 1/3

C
1/6 P(A ⋂ B) 1/2

D
1/6 P(A’ ⋂ B) ½

Solution
Question 6
4 / -1

A binary operation * on the set {0, 1, 2, 3, 4, 5} is defined as the identity element is

A
0

B
1

C
2

D
3

Solution
Question 7
4 / -1

A
1 / 2

B
1

C
-1 / 2

D
-1

Solution
Question 8
4 / -1

A

B

C

D

Solution
Question 9
4 / -1

A

B

C

D

Solution
Question 10
4 / -1

A
{-1, 1}

B
{-1, 0}

C
{0, 1}

D
{-1, 0, 1}

Solution