Question

m) X
+
Q.25 :-The table below gives the marks obtained by 10 students in statistics.
Calculate mean and standard deviation
Studenti
2
3.
14.
5
6
8
10
Marks 43
48
65
57
3
48.
78
59​

Answer 1

Answer:

Answer

Vertices(±5,0)Foci(±7,0)

a=±5 and ae=±7

And e=

5

7

We know e=

1+

a

2

b

2

On squaring both sides we get:

e

2

=1+

a

2

b

2

Or

25

49

=1+

25

b

2

Or

25

b

2

=

25

24

b

2

=24

The equation of hyperbola is

25

x

2

−

24

y

2

=1

24x

2

−25y

2

=600

Hence, Option [A] and [C] are correct.

Answer 2

Answer:

णठथमठझखतगरग छखछखझतखथख