How many numbers between 1 and 1000 are divisible by 2, 3, 5 or 7? Further, $991$ and $997$ are below $1000$ so shouldn't have been removed either This gives $224+2+2=228$ numbers relatively prime to $210$, so $1000-228=772$ numbers are divisible by $2$, $3$, $5$, or $7$
Differential equations : A tank contains 1000 L of brine A tank contains 1000 L of brine (that is, salt water) with 15 kg of dissolved salt Pure water enters the top of the tank at a constant rate of 10 L min The solution is thoroughly mixed and
Why is kg m³ to g cm³1 to 1000? - Mathematics Stack Exchange I understand that changing the divisor multiplies the result by that, but why doesn't changing the numerator cancel that out? I found out somewhere else since posting, is there a way to delete this?
probability - A lottery will be held. From 1000 numbers, one will be . . . From 1000 numbers, one will be randomly chosen as the winner A lottery ticket is a random number between 1 and 1000 with replacement How many tickets do you need to buy for the probability of winning to be at least 50%? I am having trouble starting this problem and was told to find the probability of no winning tickets out of n tickets
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