78. Exemplar Exercise Problem XXXVII

A child’s game has $8$ triangles of which $3$ are blue and rest are red, and $10$ squares of which $6$ are blue and rest are red. One piece is lost at random. Find the probability that it is a

1. triangle

 

2. square

 

3. square of blue colour

 

4. triangle of red colour

 

The probability of lost figure is a triangle is $\frac{i}{i}$.

 

The probability of lost figure is a square is $\frac{i}{i}$.