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i would say it was 6*5*4*3*2*1divide by 4*3*2*1
thats how we have been taught in england
I'm pretty sure this is right. I don't know about the first one though. Like he implied, the n means AND (in both) and the u means OR (in at least one of the two).
n is the intersection of the two sets. so whichever numbers are in both
u is the union of the two sets which is all the numbers in both sets
im pretty sure its right cos you have 6 people so 6 possible outcomes and 4 can only take place so it is 6! divide by 4!
we did one like this in class today and it was how i did it and got it right
also i forgot to ask but what level of maths is this e.g. high school or what ?
i am at college in england (which is like the last 2 years of high school) and we are doing this
The compound interest formula describes the total amount (including the initial amount) which you find in your bank account when all interest earned is put back (reinvested) to earn further interest, rather than being sent to you or being put aside - provided the interest rate is constant.
When you place an initial amount P into an account, it is called the principal. In a compound interest account the following happens. The money in your account grows to an amount A after n periods. (The number n here identifies the number of periods your money stays in the account without any withdrawals, or deposits, except for interest payments at the end of each period.) The amount A is given by the compound interest formula A = P(1+i)n In this formula, the interest rate per period is given by the quantity i. The formula should only be used when interest is compounded. Again, compounded means the interest is reinvested at the end of each period with no other deposits or withdrawals, Each interest payment deposited in your account then earns interest (rent from the bank) in the following periods.