Question

1. Find the mean of following data 3,10,12,7,9,8,7
2. A bag contains 2 red, 3 blue and 5 black balls. A ball is drawn at random. What is
the probability of drawing (i) a red ball
(ii) a blue ball

3. Find the area of a square plot whose perimeter is 100 m.
4. Find the side of the triangle whose area is 48 cm2 and the corresponding altitude is
8 cm.
5. If the circumference of a circle is 188.4 cm. Find it’s radius.(Take π as 3.14)

Answer 1

Answer:

3 perimeter of a square =4×side

Step-by-step explanation:

4×100=400

Answer 2

Answer:

5 the answr phto

Step-by-step explanation:

1)3+10+12+7+9+8+7÷7=8

mean of 3,10,12,7,9,8,7 is 8

2)1)no of possible outcomes =10

no of favourable outcomes=2

probability=favourable outcomes/possible outcomes

so 2/10=1/5 is the probability to get e red ball

2)2)3/10

3) perimeter of square plot is 100 cm

here perimeter of square= 4a

4a=100

a=100/4=25

then area= a square

so 25square=625

4)area of triangle=1/2×b×h

1/2×8×h=48

4h=48

h=48/4

h=12