Question

In a right triangle, the square of the hypotenuse is equal to the su
Sides.
1+ tan’A
6.Prove that (1+cor-A)-(4- con A)* = tan’A
R7. The following distribution shows the daily pocket allowanc
mean pocket allowance is Rs.18. Find the missing frequency f.
ly Pocket
11-13 13-15 | 15-17 | 17-1​

Answer 1

Answer:

rrrrtyyuii

Step-by-step explanation:

s GB wurwteudy

Answer 2

Answer:

ANSWER

Answer:-

Let the missing frequency be x.

Class interval Frequency x

i

f

i

x

i

11-13 7 12 84

13-15 6 14 84

15-17 9 16 144

17-19 13 18 234

19-21 x 20 20x

21-23 5 22 110

23-25 4 24 96

Σf

i

=44+x Σf

i

x

i

=752+20x

average pocket allowance

x

ˉ

=

Σf

i

Σf

i

x

i

=18⇒(given)

∴

44+x

752+20x

=18

⇒752+20x=18(44+x)

⇒752+20x=792+18x

⇒2x=40

⇒x=20

Hence, the missing frequency is 20.