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In a survey, a group of mobile phone users were asked about the platforms on which their phones is based. The number of Java users is 75% less than the Android users, while the number of Android users is 40% more than the iOS users. If the number of Java users is 247 less than the iOS users, then how many of them are Android users?1). 5322). 6843). 7964). 818 |
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Answer» Given, Java users is 75% less than ANDROID users ⇒ Java users = 25% of Android users ⇒ Java users = 1/4 × Android users---- (1) Also, Android users is 40% more than iOS users ⇒ Android users = 140% of iOS users ⇒ Android users = 7/5 × iOS users---- (2) SUBSTITUTING (2) in (1), we get, ⇒ Java users = 1/4 × 7/5 × iOS users = 7/20 × iOS users Now, iOS users – Java users = 247 ⇒ iOS users – 7/20 × iOS users = 247 ⇒ 13/20 × iOS users = 247 ⇒ iOS users = 20/13 × 247 = 380 Substituting in (2), we get, ∴ No. of Android users = 7/5 × 380 = 532 |
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