In a class of 21 students, 8 have a brother and 16 have a sister. there are 3 students who do not have any siblings. what is the probability that a student who has a sister also has a brother

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Can some one explain this i got sent this. is this a threat i’m scared

2,10,-50 next two numbers geometric sequence