Gary collects stamps as a hobby. He gives his cousin 1/3 of his stamp collection. He then gives his sister 5/6 of the remainder and has 80 stamps left. How many stamps did he have at first?

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)

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