Mathematics - Introduction to Statistics (Stastics) Chebyshev's theorem says that within two standard deviations of the mean, you will always find at least 89% of the data.

A)true
B) false

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

How do you solve a question like this?