Answer:
The boy score 164 points.
Step-by-step explanation:
We are given that some friends who were playing darts decided to impose a 2 point penalty for each dart that missed the dartboard completely.
During the evening, a boy had 5 darts in the 20-point section, 2 darts in the triple-15-point section, and 4 darts in the double-10 point section. He missed the dartboard completely 3 times.
The points boy scored by pointing the dart in the 20-point section = 5 20 = 100 points
The points boy scored by pointing the dart in the 15-point section = 2 15 = 30 points
The points boy scored by pointing the dart in the 10-point section = 4 10 = 40 points
The penalty points imposed on the boy = 3 2 = 6 points
So, the total points boy scored = 100 + 30 + 40 - 6 = 164 points.