psychology students took a standardized test. The scores are summarized in the GFDT below.

Scores | Frequency |
---|---|

180 - 199 | 11 |

200 - 219 | 18 |

220 - 239 | 12 |

240 - 259 | |

260 - 279 | 13 |

280 - 299 | 52 |

The scores are also described in the cumulative table shown below.

Scores | Frequency |
---|---|

less than 200 | 11 |

less than 220 | 29 |

less than 240 | 41 |

less than 260 | 55 |

less than 280 | 68 |

less than 300 | nn |

What is the missing value in the GFDT?

answer =

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