Probability Exponential Distribution Problems

array(10) { [0]=> object(stdClass)#6956 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "CjF_yQ2N638" ["related_video_title"]=> string(88) "Standard Normal Distribution Tables, Z Scores, Probability & Empirical Rule - Stats" ["posted_time"]=> string(19) "5 лет назад" ["channelName"]=> string(27) "The Organic Chemistry Tutor" } [1]=> object(stdClass)#6929 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "m0o-585xwW0" ["related_video_title"]=> string(67) "Introduction to Poisson Distribution - Probability & Statistics" ["posted_time"]=> string(19) "6 лет назад" ["channelName"]=> string(27) "The Organic Chemistry Tutor" } [2]=> object(stdClass)#6954 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "gHBL5Zau3NE" ["related_video_title"]=> string(46) "Normal Distribution & Probability Problems" ["posted_time"]=> string(19) "7 лет назад" ["channelName"]=> string(27) "The Organic Chemistry Tutor" } [3]=> object(stdClass)#6961 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "2kg1O0j1J9c" ["related_video_title"]=> string(78) "Exponential Distribution! AWESOME EXPLANATION. Why is it called "Exponential"?" ["posted_time"]=> string(19) "5 лет назад" ["channelName"]=> string(13) "zedstatistics" } [4]=> object(stdClass)#6940 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "OByl4RJxnKA" ["related_video_title"]=> string(68) "Bayes' Theorem of Probability With Tree Diagrams & Venn Diagrams" ["posted_time"]=> string(19) "6 лет назад" ["channelName"]=> string(27) "The Organic Chemistry Tutor" } [5]=> object(stdClass)#6958 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "xI9ZHGOSaCg" ["related_video_title"]=> string(43) "Normal Distribution EXPLAINED with Examples" ["posted_time"]=> string(21) "4 года назад" ["channelName"]=> string(10) "Ace Tutors" } [6]=> object(stdClass)#6953 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "w8OQBiNrazs" ["related_video_title"]=> string(114) "Протесты на Алтае. Ставленник Путина Турчак уничтожает регион" ["posted_time"]=> string(23) "5 часов назад" ["channelName"]=> string(27) "Владимир Милов" } [7]=> object(stdClass)#6963 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "2C8zYFArnKY" ["related_video_title"]=> string(121) "Самая холодная деревня в мире (Это видео стоило мне здоровья) -71°C" ["posted_time"]=> string(24) "19 часов назад" ["channelName"]=> string(11) "Ruhi Çenet" } [8]=> object(stdClass)#6939 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "QxqxdQ_g2uw" ["related_video_title"]=> string(57) "Continuous Probability Distributions - Basic Introduction" ["posted_time"]=> string(19) "5 лет назад" ["channelName"]=> string(27) "The Organic Chemistry Tutor" } [9]=> object(stdClass)#6957 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "J0Yzmb_PY3Y" ["related_video_title"]=> string(45) "39 - The gamma distribution - an introduction" ["posted_time"]=> string(20) "10 лет назад" ["channelName"]=> string(7) "Ox educ" } }