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Abraham Nduru

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Q: Who was the first black Actuary in South Africa?
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How much does an actuary make yearly?

The average salary for graduate trainee actuaries during their first year of work is £24,000 (salary data collected Jan 09). Starting salaries vary according to specialism and location. For example, salaries are likely to be higher in actuarial consultancy in London and the South East.Typical salaries for newly qualified actuaries are in the range of £42,000 - £60,000 (salary data collected Jan 09). Salary progression is then dependent upon the individual's performance and career path.Senior positions can easily attract salaries in excess of £100,000


A marble is drawn at random first from a jar containing four black and four white marbles and then from a jar containing six black and two white marbles What is the probability of drawing two black?

It is (4/8)*(6/8) = 3/8


What is the probability of drawing 3 black cards (spades or clubs) from a standard 52-card deck?

The probability of drawing three black cards from a standard pack depends on:whether the cards are drawn at random,whether or not the drawn cards are replaced before the next card is drawn,whether the probability that is required is that three black cards are drawn after however many draws, or that three black cards are drawn in a sequence at some stage - but not necessarily the first three, or that the first three cards cards that are drawn are black.There is no information on any of these and so it is not possible to be certain about the answer.The probability of drawing three black cards, in three random draws - without replacement - from a standard deck, is 0.1176 approx.


If A bag contains 3 orange 5 black and 2 white marbles Two marbles are drawn but the first marble is not replaced Find P white then black?

Bag with 10 marbles: 3 orange, 5 black, 2 white.Rephrasing the question.If a marble is drawn from the bag, then returned to the bag, and a second marbleis drawn, what is the probability that the first marble turns out white and the secondmarble black ?The probability for a marble to come out white from the bag is:P(W) = 2/10 = 1/5The probability for a marble to come out black from the bag is:P(B) = 5/10 = 1/2The probability for a marble to come out white, put back in the bag and then take again a marble for a second time and turns out to be black is:P(B2|W1) = (1/5)∙(1/2) = 1/10 = 0.10 = 10 %


If a drawer contains 7 blue socks 4 white socks and 9 black socks what is the probability that the first sock will be white?

Well, if this drawer contains that amount of socks of each color, then you will have a 1:5 probability that the the first sock you draw will be white. 7+4+9=20 4(white)/20(in all) 1(white)/5(all) :D