Question

A tyre manufacturing company kept a record of distance covered before a tyre needed to be replaced. The table shows the results of 1000 cases. Distance(in Km) Less than 4000 4000to 9000 9001 to 14000 More than 14000 Frequency 20 210 325 445​

Answer 1

Answer:

The total number of trials = 1000  

(i) P (tyre to be replaced before it covers 4000 km) = 20/1000 = 0.02

(ii) The frequency of a tyre that will last more than 9000 km = 325 + 445

= 770  

∴ P (tyre will last for more than 9000 km) = 770/1000 =  0.77

(iii) The frequency of a tyre that requires replacement between 4000 km and 14000 km

= 210 + 325 = 535  

So, P (tyre requiring replacement between 4000 km and 14000 km)

= 535/1000 = 0.535

Step-by-step explanation: