The dartboard shown in the figure is divided into 35 equal divisions. Landing in regions A, B, C and D gets 4, 3, 2 and 1 points respectively. A dart is thrown and hits the dartboard.
(a) Find the probability taht it lands in one of the following regions:
(i) redion A
(ii) region D
(b) Find the expected score, correct to 2 decimal places.[Assume the dart doesn't land in the boundaries.]
5. If the mean of three numbers is 13 and the mean of another five numbers is 19, find the mean of the eight numbers.
6.Given the set of data:
x/2, 4x/5, 6x/7, x/3, 7x/6
Find the value of x when the median is 8.
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2. How many km is it between two places, if a car travelling 2d km an hour takes 3 hours to finish the journet