Explain how you can solve exercise 3 mentally

In a probability experiment, karen flipped a coin 76 times. the coin landed on heads 32 times. what percentage of the coin flips resulted in tails? round to the nearest percent. a. 58% b. 65% c. 42% d. 60%

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog