| Event: Sum on 2 dice | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Probability | $\frac{1}{{36}}$ | $\frac{5}{{36}}$ | $\frac{1}{{36}}$ |
| Event: Sum on 2 dice | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Probability | $\frac{1}{{36}}$ | $\frac{2}{{36}}$ | $\frac{3}{{36}}$ | $\frac{4}{{36}}$ | $\frac{5}{{36}}$ | $\frac{6}{{36}}$ | $\frac{5}{{36}}$ | $\frac{4}{{36}}$ | $\frac{3}{{36}}$ | $\frac{2}{{36}}$ | $\frac{1}{{36}}$ |
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A fraction becomes $\frac { 9 } { 11 }$ if 2 is added to both numerator and denominator. If 3 is added to both numerator and denominator it becomes $ \frac { 5 } { 6 }$. Find the fraction by substitution method.
|
Age (in years)
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10-20
|
20-30
|
30-40
|
40-50
|
50-60
|
60-70
|
|
Number of patients
|
60
|
42
|
55
|
70
|
53
|
20
|