Question

Find the missing frequencies of medalsdata is 50
x. 10. 30. 50. 70. 90. total
f. 17. F1. 32. f2. 19. 120​

Answer 1

Answer:

Step-by-step explanation:

f1 + f2= 120-(17+32+19)

f1+f2= 120-68

f1=52-f2--------(1)

mean=sigma xi fi/ sigma fi

50= 3480+30F1+70F2/ 120

50= 10(348+3F1+7F2)/120

600=348+3F1+7F2

Sub equation 1 

600-348= 3(52-f2)+7f2

252= 156-3f2+7f2

96=4f2

f2=24

therefore,

f1=52-24=28