// Numbas version: exam_results_page_options
{"name": "Number of impressions served", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Number of impressions served", "tags": [], "metadata": {"description": "<p>Given n = k%, what is 100%?</p>", "licence": "Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International"}, "statement": "<p>You've received {separateThousands(clicks,\",\")} clicks. The CTR (Click Through Rate) was {CTR}%. How many impressions were served?</p>", "advice": "<p>A CTR of {CTR}% means that {CTR}% of people who were served the ad clicked on it.</p>\n<p>We need to find 100% of the people who were served the ad.</p>\n<p>{CTR}% = {clicks}</p>\n<p>1% = $\\frac{\\var{clicks}}{\\var{CTR}}$</p>\n<p>100% = $\\frac{\\var{clicks}\\times 100}{\\var{CTR}}$ = {separateThousands(total,\",\")}</p>\n<p>So {separateThousands(total,\",\")} people were served the ad.</p>", "rulesets": {}, "extensions": [], "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"ctr": {"name": "ctr", "group": "Ungrouped variables", "definition": "random(1..20)", "description": "", "templateType": "anything", "can_override": false}, "clicks": {"name": "clicks", "group": "Ungrouped variables", "definition": "random(100..10000#100)*ctr", "description": "", "templateType": "anything", "can_override": false}, "total": {"name": "total", "group": "Ungrouped variables", "definition": "clicks*100/ctr", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["ctr", "clicks", "total"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "numberentry", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "minValue": "total", "maxValue": "total", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always", "contributors": [{"name": "Merryn Horrocks", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/4052/"}]}]}], "contributors": [{"name": "Merryn Horrocks", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/4052/"}]}