Math, asked by vijayalaxmi85, 10 months ago

plzzzz explain this answer plzzzzz

Attachments:

Answers

Answered by aman292582

0

Answer:

mean is 30

x. f. xf

5. 6. 30

10 12. 120

15. 18. 270

20. f. 20f

25 4. 100

sigma=520+20f

mean = sigmaxf/sigmaf

30=(520+20f)/40+f

30(40+f)=520+20f

120+30f=520+20f

10f=400

f=40

Previous Question

Next Question

Similar questions

Computer Science, 5 months ago

Is a collection of picture or images that are available in microsoft office gallery...

English, 5 months ago

Some sentence about milkha singh...

Science, 5 months ago

Along shunt compound generator delivers a load current of 50 ampere at 500 volt and the resistance of armature series field and front field are 0.05 m and 0.03 ohm and 250 ohm respectively calculate the generated emf and armature current allow 1.0 volt per brass of connected drop...

Math, 10 months ago

Mary takes 4 1/2 minutes to cross the bridge by car and Tarun 3 1/3 minutes to do the same. Who takes more time and by how much?

Geography, 10 months ago

The only planet of the solar system on which water is present: (a) Earth (b) Mercury (c) Jupiter (d) Saturn...

History, 1 year ago

in the concept of latent heat applicable during transformation of gaseous Phase to liquid phase and from liquid phase to solid phase...

Social Sciences, 1 year ago

the main source of income of Mughal rulers was: a) tax on produce of industries b) on the income of people c) on the produce of peasantry d) on houses and land...

Math, 1 year ago

✌ A dealer supplied walky talky set of Rs 84000 ( with GST ) to police control room. Rate of GST is 12%. Find the amount of state and central GST charged by the dealer. Also find the taxable value.