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Probability Questions

A dice is thrown 80 times. it lands on a six 12 times. What is the probability of throwing a six?
A drawer contains 50 bolts and 150 nuts.half of bolts and half of nuts are rusted.if one is chosen at random,what is the probability of that is rusted or bolt.
Brad goes to a shop that sells five flavours of ice-cream. Each flavour comes in a separate tub. He decides to buy two tubs, each on containing a different flavour. How many choices are possible?
Can you explain Standard Deviation please.
Math Probability
On a credit card there are 4 groups of 4 numbers how many permutaions can you have?
Permutation & combination
Probability
Probability of dice? i need answer as soon as possible, any guys help me to find anser

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Category: maths