Question

why do you think the colour of sky is blue ?​

Answer 1

we don't think sky is actually blue..

Well the answer is

Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

Answer 2

Sorry for answering here,

Mode : The mode is the value that appears most often in a set of data values

formula : L + ( f1 - fo)

---------------- x h

( 2f1 - fo - f2)

So for understanding these terms lets take an example.

Class. frequ-

interval. ency

10 - 20. 2

20 - 30. 5 (fo)

30 - 40. 8. (f1)

40 - 50. 3. (f2)

50 - 60. 2

60 - 70. 4

¤ from all the frequencies firstly select the highest frequency, here it is 8

¤ secondly, check the corresponding class it will be called as model class, here it will be 30 - 40

¤ then select the lower limit of the model class

here 30 is the lower limit.

¤ the difference between the modle class is 'h'

here, h = 10 ( 40 - 30 = 10)

¤ Now, L = lower limit of modle class ( 30)

f1 = highest frequency ( 8)

fo = preceding term of highest frequency ( 5)

f2= succeeding term of highest frequency ( 3)

h = difference between model class ( 10)

here, mode = L + ( f1 - fo)

---------------- x h

( 2f1 - fo - f2)

mode = 30 + ( 8 - 5)

---------------- x 10

( 16 - 5 - 3)

mode = 30+ [ 3 ]

------- x 10

[ 8 ]

mode = 30 + 0. 375 x 10

mode = 30 + 3.75

therefore, mode = 33.75

I hope this helps you......!!