First term examination 2

The width of each of five continuous classes in a frequency distribution is 5 and the lower class limit of the lowest class is 10. The lower class limit of the highest class is:

• 15

• 30

• 35

• 40

Assertion: The difference between the maximum and

minimum values of a variable is called its range.

Reason: The number of times a variate (observation)

occurs in a given data is called range.

• Both assertion and reason are true and the reason is

  the correct explanation of assertion.

• Both assertion and reason are true but the reason is

  not the correct explanation of assertion.

• The assertion is true but the reason is false.

• The assertion is false but the reason is true.

State whether True or False

The data collected by the investigator himself for a

definite plan or purpose is known as primary data.

• True

• False

The width of the class interval is called .......... of class

interval.

• mode

• Median

• size

The .......... of all bars in histogram should be uniform.

• Height

• width

• Size

If two sides of a triangle are unequal then opposite

angle of the larger side is

• greater

• less

• equal

• half

Which of the following is a correct statement?

• In an isosceles triangle, the angles opposite to

  equal sides are equal.

• If the hypotenuse and an acute angle of the right-angled

  triangle are not equal to the hypotenuse

  and the corresponding acute angle of another

  triangle, then the triangles are congruent.

• The bisector of the vertical angle of an isosceles

  triangle bisects the base at acute angles.

• All of these

If  $\Delta$ ABC  $\cong$    $\Delta$  PQR 

and  $\Delta$  ABC is not congruent to

   $\Delta$ RPQ, 

then which of the following is not true?

• BC = PQ

• AC = PR

• AB = PQ

• QR = BC

Assertion: Angles opposite to equal sides of a triangle

are equal.

Reason: Sides opposite to equal angles of a triangle

are not equal.

• Both assertion and reason are true and the reason is

  the correct explanation of assertion.

• Both assertion and reason are true but the reason is

  not the correct explanation of assertion.

• The assertion is true but the reason is false.

• The assertion is false but the reason is true.

Assertion: In triangles ABC and PQR,
 $\angle A=\angle P,\$   $\angle C=\angle R$   and AC = PR.
The two triangles are congruent by ASA congruence.
Reason: If two angles and included side of a triangle
are equal to the corresponding angles and side of the
other triangles then the triangles are congruent by
ASA congruence criteria.

• Both assertion and reason are true and the reason is

  the correct explanation of assertion.

• Both assertion and reason are true but the reason is

  not the correct explanation of assertion.

• The assertion is true but the reason is false.

• The assertion is false but the reason is true.