math games ages

A survey reported that 64% of the children of 12 to 15 years of age play online games. In a sample of 200 of this age group, 150 responded positively. Test the survey report at α = 0.01. => z = 3.24, there is enough evidence to reject the survey report or z = 1.6..

Greg and Linda are playing a game spinning a spinner that has more red than yellow. The game is ________ game. => an unfair or I don′t know. or a red or a fair..

Which is a fair game? => Toss a coin twice. You win if you get head both times and your friend wins if he gets tail both times. or Toss a coin ten times. You win if you get head always and your friend wins if he gets 5 heads and 5 tails. or There are 2 green, 5 black, and 7 blue pebbles i..

Which of these games is fair? => Toss a coin five times. You get 2 points for each head. Your friend gets 1 point for each head. or Roll a dice 10 times. You win if you roll a 3 seven times. Your friend wins if she rolls a 3 five times. or There are 5 gray, 5 black, and 5 blue marbles in ..

A tennis player won 20% of the games he played. Find the total number of games played by him if he won 10 games. => 50 or 52 or 47 or 49..

Jimmy lost 6 out of 15 games he played. Find the ratio of the games won to the games played. => 3 to 5 or 4 to 15 or 6 to 15 or 2 to 5..

Put the following information in matrix form. Three teams have played 18 games. Team A won 7 games and lost 11 games. Team B won 6 games and lost 12 games. and Team C won 8 games and lost 10 games. => Won Lost Team A Team B Team ..

The average age of 15 boys is 7 years. What is the sum of their ages? => 105 years or 125 years or 95 years or 115 years..

Four years ago, Robert was 15 times as old as his son. Now his age is the square of his son's age. Find their present ages, if Robert's age is below 60. => 36, 6 or 49, 7 or 64, 8 or 25, 5..

The age of a mother is 29 years more than that of her daughter. 4 years later, mother's age will be twice that of the daughter's age. Find their present ages. => Daughter: 8 years, Mother: 46 years or Daughter: 25 years, Mother: 54 years or Daughter: 4 years,..