Question

please solve it as soon as possible ​

Answer 1

Answer:

15 and 10

Step-by-step explanation:

Two frequencies are unknown,

which we will display with f1 and f2

The first equation will be obtained from frequency

75 + f1 + f2 = 100 → f1 + f2 = 25

The second equation will be related to the median Median

(M) = 30,

Median Class is 30-40 .

m= L1 + N/2-c/f × xi

30 = 80 + 50-(35 + fi)/30 × 10

0= 15 - fi /3 or fi = 15

Z = 87.5

Putting the value of f1 in equation

(i) f1 + f2= 25

15 + f2 = 25

f2 = 25 – 10

Thus f1 = 15, f2 = 10.

Answer 2

Answer:

15 and 10

Step-by-step explanation:

Two frequencies are unknown,

which we will display with f1 and f2

The first equation will be obtained from frequency

75 + f1 + f2 = 100 → f1 + f2 = 25

The second equation will be related to the median Median

(M) = 30,

Median Class is 30-40 .

m= L1 + N/2-c/f × xi

30 = 80 + 50-(35 + fi)/30 × 10

0= 15 - fi /3 or fi = 15

Z = 87.5

Putting the value of f1 in equation

(i) f1 + f2= 25

15 + f2 = 25

f2 = 25 – 10

Thus f1 = 15, f2 = 10.

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