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15.******* The bacteria had a probability of splitting into three and a probability to die is one third of total bacteria. Let the probability be P. Some of them survived with probability 1/5 than which among the following relation is true?
(a) P=1/3+1/5*3
(b) P=1/5*(1/8-3)

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14. *******X is 3 years younger to Y, X’s father is a businessman who invested 10000/- at 8% rate of interest and obtained his amount after 10 years .Y’s father is a job holder who invested around 20000 at 2% rate and obtained his amount after 20 years . Now compounded both of them get around ABC rs/- . After 5 years the ratio of ages of X & Y is 1:2. Now X’s father is 20 years older to Y and Y’s father is 30 years more than X. After 20 years again X’s mother asks X’s father to purchase a LCD TV which costs around 45000/-. What is the age of X and Y together?

19.******* An old toy had three grandchildren, the difference between two children was 3 years. Her eldest grandchild was 3 times elder than the youngest one and the elder one 2 years more than the sum of the other two. Then what is the age of the eldest child?