A coin was flipped 150 times. The results of the experiment are shown in the following table:

Heads Tails
90 60

Which of the following best describes the experimental probability of getting heads?
It is 10% higher than the theoretical probability.
It is 10% lower than the theoretical probability.
It is equal to the theoretical probability of this data.

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?